The trustee of the M. family Bitcoin trust earned three times his usual fee last quarter — a raise he attributes entirely to the price of Bitcoin and not at all to anything he did, which was nothing.

The fee, set at 1% of the trust's assets per year — a standard arrangement for trustees managing stocks and bonds — tripled in lockstep with a tripling vault, despite the underlying work consisting of, by the trustee's own accounting, "checking that the number was still there."

"I looked at it in January. I looked at it again in March. It had gone up, and so, somehow, had my compensation," the trustee said, declining to explain the connection because there isn't one.

Observers note that tying a fee to the price of an asset that mostly rises means paying more and more for work that does not change — an arrangement that benefits exactly one party.

The Bitcoin did all the appreciating. The fee took all the credit.

The family is now exploring paying for the work that is actually done, a concept the trustee described as "novel" and "concerning."