What Happens to Bitcoin After All 21 Million are Mined?
Bitcoin is like gold in many ways. Like gold, Bitcoin cannot simply be created arbitrarily. Gold must be mined out of the ground, and Bitcoin must be mined via digital means. Linked with this process is the stipulation set forth by the founders of Bitcoin that, like gold, it have a limited and finite supply. In fact, there are only 21 million Bitcoins that can be mined in total. Once miners have unlocked this many Bitcoins, the planet's supply will essentially be tapped out. What will happen when the global supply of Bitcoin reaches its limit?
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it'll take forever to get to 21 million coins mined... because of the difficulty rate.
but keeping coins limited means supply is fixed and there would eventually be a greater demand