So what do our ancestors do once they get to block 500,000,000?
🤔 
Discussion
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I believe there is a known timestamp bug which will happen even earlier, sometime in the 2030s. They’ll just update the code though.
Bitcoin will run out of block numbers after block number 5101541 unless a hard fork is done to address the date bug. This is expected around year 2106
descendants*
But also I dunno.