What is Bitcoin halving?
An event that halves the rate at which new Bitcoins are created. It occurs once every four years.
As many know, Bitcoin’s (BTC) supply is finite. Once 21 million coins are generated, the network will stop producing more. That is one of the main reasons Bitcoin is often referred to as “digital gold” — just like with the yellow metal, there is only a limited amount in the world, and someday, all of it will have been extracted.
Right now, there are around 18 million BTC in circulation, which is roughly 85% of the total cap — but it doesn’t mean that the cryptocurrency is about to reach its limit any time soon. The reason is the protocol, which has been coded into the blockchain from the very start: Every 210,000 blocks, it performs the so-called Bitcoin “halving” or “halvening,” and producing new coins becomes more difficult — just like in gold mining where finding new deposits becomes more challenging over time.
More specifically, the protocol cuts the block reward in half. So, every time a Bitcoin halving occurs, miners begin receiving 50% fewer BTC for verifying transactions.