Stefan Thomas (7002 BTC, IronKey 2 with password attempts left)

As for his lost password and inaccessible Bitcoin, Mr. Thomas has put the IronKey in a secure facility - he won’t say where - in case cryptographers come up with new ways of cracking complex passwords. Keeping it far away helps him try not to think about it, he said.

“I would just lay in bed and think about it," Mr. Thomas said.