Stefan Thomas invested in the digital currency Bitcoin in 2011, back when it sold for just $2. Today, it sells for $35,000 per bitcoin, leaving Thomas with a $225 million fortune. The only problem — he can’t remember the password to access his digital wallet. Ten years ago, when he bought the bitcoins, he misplaced the password. Now he has used 8 of his 10 login attempts before the account locks him out of his treasure forever.