David M., 44, checked his Bitcoin balance for the ninth time on Thursday, confirming on each occasion that it remained precisely what it had been on the previous eight.

He checked at breakfast, at a red light, and once in a meeting he described afterward as "important." No transaction had occurred in the interim. None was expected. The number sat there, the same number, doing the same thing numbers do.

He finds the figure both deeply reassuring and somehow insufficient, a paradox he intends to resolve by checking again shortly.

The balance has not moved since Tuesday. The man has consulted it forty times since.