What is Cryptocurrency?
Now, we’ve come to the conclusion that the modern finance industry and money itself is indeed broken, manipulated and debased by governments and banks. How then, does cryptocurrency resolve these issues?
It’s simple. Cryptocurrency removes the 2 key elements in the management of money and finance: Trust and Centralization. (See also: When Trust is No Longer an Issue)
I’ve been working on a new electronic cash system that’s fully peer-to-peer, with no trusted third party
— Satoshi Nakamoto
The above quote is from the creator of Bitcoin, Satoshi Nakamoto. To be clear, while Bitcoin is a type of cryptocurrency, it is not the only cryptocurrency. However, most cryptocurrencies adopt the principles of Bitcoin in their creation and protocols, especially with regards to the design of the set of rules governing them. A clear understanding of Bitcoin’s inner workings would greatly facilitate one’s understanding of any type of cryptocurrency as it was the very first one to be implemented from the concept.
To put it simply, the aim of Bitcoin was to create a cryptographically secure currency that could be used as a form of universal cash and replace all forms of fiat currency in the world. What was not expected, however, was that because Bitcoin code was open source, people could create their own version of Bitcoin by replicating and tweaking the code to suit their own needs, in essence starting a new cryptocurrency. (Read more: Coins, Tokens & Altcoins: What’s the Difference?)
I say not expected because firstly, Bitcoin was so far ahead of its time when it began that it didn’t seem to make sense to create a competitor. Secondly, there needed to be some incentivization for people to switch from Bitcoin to something else. Given that it took a significant number of years for Bitcoin to accumulate any significant fiat value (as people had no idea what it was), the idea that a new cryptocurrency could accumulate value at a faster rate than something that had the first mover advantage was inconceivable.
Unexpectedly, the explosion of cryptocurrencies was actually accelerated with the growth of Bitcoin because more and more people saw the value within the idea of a decentralized, unregulatable, purely digital form of cash. Today, there are new cryptocurrencies being created every single day, all hoping to become the next Bitcoin. (Read also: 4 Reasons Why Now is the Best Time for You to Invest in Cryptocurrencies)
Great nations are never impoverished by private, though they sometimes are by public prodigality and misconduct
— Adam Smith
For now, let me move on to some specifics on the inner working of crypto and we’ll come back to crypto as money later on.
So, what makes cryptocurrency special? What makes it different from the government and fiat?
Here are the 3 characteristics of cryptocurrency
- Trustlessness: In the case of fiat, you need to trust a third party to guarantee the value of your money by not debasing it. The buyer or seller of goods and services in the transaction must make the same assumptions you do; if 1 cow is worth 100 dollars today and 1000 dollars tomorrow, why would you sell 1 cow today? Cryptocurrency removes this need to trust someone by incentivizing every actor in the network to not debase the currency and not commit fraud
- Decentralization: With banks and governments, the supply and creation of money through mints and interest rates are at their sole discretion. Users of the currency they control are hence, at their mercy. With cryptocurrency, however, no individual or consortium is able to affect the supply of currency or exert significant influence over it without the approval of the majority. Even if there is majority approval, minorities are free to “fork” away and administer their own version of the currency. Consider this something like using cigarettes in the Weimar Republic if you think your currency is being debased and now worthless
- Immutability: When we want to check how money has been removed from our bank accounts, we are able to refer to our transaction history with the bank. However, doing so implies a few things:
- That we trust the bank does not fabricate false transactions and manipulate our money
- That we trust the bank delivers outgoing transactions to our intended recipients
- That the bank employs sufficient security to ensure that other parties are not able to make these transactions on our behalf. When the element of trust and centralization is removed from the equation, however, there is no longer any party to trust to do this. As a result, records need to be made public and unchangeable. The cryptographically secure nature of cryptocurrency ensures that while it is not impossible to change the transaction ledger, it is extremely difficult and would require you to oppose the entire network of cryptocurrency users.
How are these actually achieved? How can I be sure that cryptocurrency is not a fraud?
In order to understand how and why these characteristics of cryptocurrency exist, it is necessary to take a closer look at the technology underpinning every cryptocurrency: The Blockchain.
“Blockchain Technology” is a term you have probably heard used a lot by many different companies, especially banks, hoping to capitalize on the cryptocurrency mania. What is not understood by many, however, is that the blockchain was originally designed inherently with cryptocurrency. That is to say, it is not possible to separate both concepts* as the cryptocurrency underpins the security of the blockchain.
So what is the blockchain anyway?
To put simply, the blockchain is the public ledger of records. It contains the list of every single transaction, every single “account” and every single piece of data that has been sent through the network. It is also, permanent. (Read more Guide to Verifying Cryptocurrency Transactions)
Its unchangeability comes from the way the blockchain is derived. As its name implies, IT consists of segments called blocks which are individual, discrete units that are assembled into a chain, aka the blockchain, via a process known as mining (for “Proof-of-Work” blockchains) or (in the case of some blockchains running on “Proof-of-Stake”) forging or minting. In all these cases, the aim of the process is to provide some cryptographic ‘proof’ to all other network actors to a) verify that the block being presented is valid b) transactions added to the block are not fraudulent. “Proof-of-Work” and “Proof-of-Stake” can be thought of as a Parliamentary vs Presidential democracy, they work in different ways but with the same aim: Of achieving network consensus on the next block produced/discovered.
Another similarity for both consensus mechanisms is that due to nature of cryptographic hashing the proof they present is not easily produced, but easily verifiable. These cryptographic hashes also confirm the identity of each individual block as each block assembled into the blockchain actually provides a clue to the identity of the next undiscovered block, the main feature which makes it tamper-proof. There is no way to change the data existent in a single assembled block without rendering all the subsequent blocks in the blockchain invalid.
And no one will allow you to render whole portions of the blockchain invalid as this would mean
a) transactions that were carried out now do not exist
b) all the incentives collected by miners in the subsequent blocks vanish. Such actions result in what are known as network splits and hard forks. (See more: Guide to Forks: Everything You Need to Know About Forks, Hard Fork and Soft Fork)
Thus, no individuals can “correct” the blockchain without opposing the entire network of other actors. This leads me to the next important point: How cryptocurrency is intertwined with the creation of the blockchain and how its the security is actually benefited by the selfish behaviours of individual actors.
Incentivization of individual network actors is a point previously mentioned briefly in discussing the trustless design of cryptocurrencies, do not, however, think that it is a merely a feature; it is, in fact, the most groundbreaking idea in modern economics. For the purpose of this article, I will be limiting the scope to “Proof-of-Work” incentivization as it is the most widespread consensus mechanism in use today as well as an excellent starting point for understanding the solution presented by cryptocurrencies.
The incentive may help encourage nodes to stay honest. If a greedy attacker is able to assemble more CPU proof-of-worker than all the honest nodes, he would have to choose between using it to defraud people by stealing back his payments or using it to generate new coins. He ought to find it more profitable to play by the rules, such rules that favour him with more new coins than everyone else combined, than to undermine the system and the validity of his own wealth
— Satoshi Nakamoto
With fiat money, fraud is committed is because of selfish profit motives: the individuals performing the fraudulent actions have everything to gain and nothing to lose if they are not discovered or if they are beyond the reach of the law. With cryptocurrency, a system is produced that no one stands to benefit with fraudulent actions. In fact, they stand to benefit performing non-fraudulent actions instead. (Read also: Guide on Identifying Scam Coins)
Network actors are categorized into 3 non-exclusive categories:
- Users, who are the people transacting and owning crypto,
- Full nodes, the network of machines that run verifications against the blocks produced, and
- Miners, the profit maximising entities providing computational power to discover new blocks and power the blockchain.
Remember, they are non-exclusive: A miner is always both a full node and a user, a user could or could not be a full node, a node could be just a node and so on.
Mining was briefly covered above, but the profit that the miners are seeking was not explained. To be brief, miners get 2 form of rewards for taking risks and expanding electricity and buying complex computers to provide the computational power to find new blocks: the block reward and transaction fees. (See more: Bitcoin vs Alt Coins Returns: Comparison of Gains Between Bitcoin & Altcoins Investing)
The block reward is a fixed amount of cryptocurrency determined by the protocol, or the set of rules governing crypto that is decided upon by the network, that is awarded to miners for discovering blocks. Think of it as the same as a mint that produces money and introduces liquidity to the economy, except not controllable by a central entity and with no ability to manipulate the supply of currency. Block reward is usually either static or unchanging in the case of inflationary cryptocurrencies with no maximum supply, or decrease every certain number of blocks in the case of deflationary cryptocurrencies with a maximum limit to the amount of crypto produced. Transaction fees are offers in crypto that users declare that they are willing to pay to have their transaction confirmed and added to the blockchain. This is similar to taxes or service fees charged by payment processors (however, at a fraction of their cost). Miners are able to select the transactions they wish to process to add to the blockchain and will tend to select transactions with higher transaction fees in order to maximise their profit. Thus, higher transaction fees mean your transaction is processed faster. Compare this to a centrally controlled fiat supply where the only cost of producing more money is the paper that it is printed on.