
Bitcoin Block Reward Halving Countdown website. be at a specific point in time, how many Bitcoins are in circulation and how many remain left to be mined. A script for calculating how much total bitcoin will be issued Any transactions left in the memory pool, after the block is filled, will remain in the pool for inclusion. The answer is approximately 2140, although it could be a bit earlier or later, depending on how block times change. While the potential pitfall of no mining budget is a problem that must eventually be addressed, for now the network is secure. Bitcoin remains valuable and becomes even more valuable with each halving.