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Chart description
Probably lost coins refer to so-called "zombie coins". Zombie coins are coins that have been inactive since the launch of the first BTC exchange in July 2010. Zombie coins are probably lost, as there is a non-zero probability that they can still be spent. Note that over time the chart steadily decreases as coins from before July 2010 are spent, eventually converging to the real number of lost coins. "Patoshi" coins are included in this category.
BTC Probably Lost Supply latest values
1,456,158.62730942
24 hours ago