An interesting bitcoin fact is that when the protocol for the bitcoin network was set up, the limit was set at 21 million coins. As a result, at some point, no more new bitcoins can be created by cryptocurrency miners.

When you help complete transactions on the bitcoin blockchain, you’re said to be bitcoin mining by using computing power through a process known as proof of work. You can receive a reward for mining bitcoin in the form of the digital currency itself.

The reward halves every 210,000 blocks, which has worked out to about every four years. As of September 2022, the total number of circulating bitcoin is 19.15 million. This leaves a few million bitcoin yet to be mined, which is part of why mining remains a popular activity.