Old Bitcoin wallets keep waking up: How many of the 1.8 million 'lost' coins are really gone?

On April 15, a long-dormant Bitcoin wallet stirred to life for the first time in nearly 14 years. The wallet owner sent $50 million in Bitcoin to Coinbase, notching a profit of over $3 million on coins that used to be worth less than a penny each. The transaction was unusual but hardly unique. Nearly every week, a wallet from Bitcoin’s early days “wakes up,” raising the question of how many more coins presumed lost could return to circulation. Now, …