50 #BTC mining reward, 10 minutes block confirmation time, and 4 years reward halving were fixed first. 21 million #bitcoin is the result of those 3 parameters. End of mining in 2140 is a result of the 8 digit precision. If you add 2 more digits, mining would continue another 24 years.

nostr:npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f237lmu63q0uf63m nostr:npub15dqlghlewk84wz3pkqqvzl2w2w36f97g89ljds8x6c094nlu02vqjllm5m nostr:npub1s05p3ha7en49dv8429tkk07nnfa9pcwczkf5x5qrdraqshxdje9sq6eyhe