Once you’ve got the basics of Bitcoin, you should start learning about some of the more intricate details of cryptocurrency. A great place to start is bitcoin halving since it is an important part of the functioning of the currency.

But what exactly does bitcoin halving mean? A process of bitcoin halving happens for every 210,000 blocks mined or roughly every four years. The last time it happened was on May 11, 2020, at around 3 pm est.  

In short, it cuts the reward given to miners for processing transactions in half. This halves the speed at which new BTC are released into circulation. The process was integrated into the cryptocurrency’s protocol by its creator, Satoshi Nakamoto. 

We take a deeper look at the process of bitcoin halving, why it happens, and what effects it has on the currency.

A Quick Recap Of Mining

Before getting into bitcoin halving, a quick recap of mining is necessary. Mining is a process whereby people connect their computers to bitcoin’s blockchain to participate as a transaction processor. 

Miners solve complex mathematical problems to confirm that transactions occurring on the blockchain are legitimate. Once they make this confirmation, they add a group of transactions to a block that is added to the end of the blockchain. When a block is filled and added, the miners who processed the block are rewarded with releasing new bitcoin. 

This release of new bitcoin (or block reward) occurs roughly every 10 minutes. Presently, the block reward is 6.25 BTC. It is this number that gets cut in half once every 210,000 blocks.

Deeper Look Into Bitcoin Halving

So, as you probably understand by now, bitcoin halving is the process in which block rewards produced by miners are halved roughly every four years. This means the rate at which new BTC enters circulation is halved every four years. But what is the purpose of this process? 

Essentially, it is a synthetic form of inflation that will occur every four years until all BTC have been released into the system and is being circulated. This will continue to occur until around the year 2140. Miners will be rewarded with fees for processing transactions, which users will pay.

These fees will keep miners interested in block confirmations and transaction processing since block rewards are currently their incentive. However, there will be no block rewards after all the bitcoins have been released.

This is another significant idea attached to bitcoin halving. As you may know, bitcoin is finite in supply. On its creation, Satoshi Nakamoto stipulated that only 21 million bitcoins would ever exist. This means that every time a bitcoin halving happens, it marks another step towards the end of the supply. 

At the time of writing (October 2020), there were 18,517,568.75 BTC in circulation. However, this number changes roughly every 10 minutes. Again, the release of BTC currently stands at 6.25 for every successful block creation. But as the block reward decreases, the rate of the creation of new BTC slows, meaning the rate at which we approach the end of BTC’s supply is slowed down too.


Bitcoin Halvings Thus Far

To give you some perspective on bitcoin halvings, let’s take a quick look at the events that have happened thus far. In 2009, when the cryptocurrency was created, 50 coins were mined for every successful creation of a block. 

After the first halving, which happened on November 28, 2012, the block reward decreased to 25 BTC. On July 9, 2016, the second halving saw the block reward decrease to 12.5 BTC, and the most recent halving, on May 11, 2020, saw the block reward decrease to 6.25 BTC. The next halving is expected in 2024, and the block reward will decrease to 3.125 BTC.  

As you can imagine, the decrease in the creation of new bitcoin, in this way, theoretically increases the price or value thereof since it is theoretically becoming more scarce. Imagine, for example, the mining of gold was to be cut down by half every four years continuously. Surely, that would drive its value up as it becomes increasingly scarce.

Effects Of Bitcoin Halving

Of course, some of the questions that are probably top of mind regarding bitcoin halving include “what effects or impact will it have on the system as a whole, on the currency, and in general?”. There are two main considerations here. The first is the price, and the second is mining stability. 

Let’s dive into each.


While (as mentioned above) theoretically, it seems obvious that the effect on the price would increase after a halving, some still doubt it. And, the truth is, we can never really predict what will happen. However, looking at previous halvings, we might get a rough idea. 

In 2012, after the first halving event, the price of BTC/USD went up by only $1, from $11 to $12. In the year following the event, though, the price skyrocketed to $1,038. The first halving set a massive precedent for the positivity around price increases with halving. 

With the 2016 halving, another surge occurred. Before this halving, the price increased from $576 to $650, as buyers purchased in anticipation of the skyrocketing value they expected from the halving.

A year later, the price went up to $2,526. Again, a massive increase. As you can see, even when there are dips in price (like when the currency went from $1,038 in 2013 to around $570 in 2016), the post-halving price is still higher than the pre-halving price. 

So, for anyone who might have assumed that a halving of the block reward prevents miners from being willing to do the confirmation of transactions, there is no need to worry because it usually does not. Again, this is because of the scarcity that is introduced by the halving. 

When the reward is halved, the available supply is lowered. This increases demand, which allows miners to charge more for the currency they plan on trading or selling. 

Additionally, if the price and demand do not increase, there is a plan to ensure that miners are still incentivised to complete transactions. Essentially, the cryptocurrency has a process in which the difficulty of mining will be decreased, making it easier to get rewards, thus keeping miners incentivised even if the price does not increase.


Mining Stability

The second point to consider is the stability of the bitcoin system. This point is closely related to the previous one, involving miners staying incentivised. As we know, miners are tremendously important for the continual functioning of the bitcoin system, from completing transactions to maintaining the network. 

Again, one might argue that a decrease in rewards makes the task of mining too much effort for insufficient reward. This may lead to a loss in miners across the network. If miners leave the network, its hash rate will decrease. 

For those who have forgotten, the hash rate is the network’s computational power as a whole. A high hash rate means that the network is much faster and more secure, whereas a lower hash rate means significantly reduced speed and security of the network. 

Therefore, if a large number of miners leave, there will be a variety of consequences. Transactions will take longer to be processed, and this will lead to a clogged-up network. And, as a worst-case scenario, it would be easier for malicious actors to plan and execute a 51% attack

Based on the statistics and data from the previous halvings, even with volatile prices and smaller block rewards, it seems that miners generally stick around. 

After the first halving, the hash rate fell from 27.61THash/s to 19.98THash/s. However, after that, it rose again to around 60THash/s. A similar hash rate rise and fall pattern occurred after the second halving in 2016. 

Significant to take into account here is the fact that after both halvings, the profitability of mining decreased, yet. Eventually, miners came back to the network. Based on this evidence, one could argue that the stability of the network, while it may fluctuate a bit around the time of halving, is not a concern in the long run.

The Halving Event: A Fundamental Element Of Bitcoin

As with most things in life, the bitcoin halving event always comes with a lot of uncertainty and potential for volatility. However, thus far, things have worked out fine in terms of price and network stability. 

Furthermore, halving is a fundamental element of the bitcoin network. It ensures that the cryptocurrency is deflationary, which keeps it ideologically in opposition to fiat currency. And, whether you like it or not, halving will happen, so it’s best to understand it and get on board.