At approximately 3:10 p.m. (EST) at block height 663,241 another 2010 block reward was spent, making it an aggregate total of 21 decade-old block rewards on December 27, 2020. Most strings of 2010 spent blocks this year have been precisely 21 consecutive blocks.**

This year, the price of bitcoin (BTC) has increased a great deal in value and during the course of the year, decade old bitcoin mining rewards have woken up from slumber. In the cryptocurrency space, old coins that haven’t moved in over a decade are sometimes referred to as ‘Satoshi-era’ coins, ‘sleeping bitcoins,’ or ‘zombie coins.’ Estimates think that there are well over a million zombie coins that haven’t moved in over a decade. On December 18, 2020, onchain researchers from Glassnode tweeted that “1.78 million bitcoins have never left their miner address.”

“That is 9.5% of the circulating bitcoin supply,” the onchain researchers said at the time. “Our analysis shows that 98% of those coins were mined more than 7 years ago, and 94% more than 10 years ago. Most could be lost forever,” the researchers added.

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