In a finding that has unsettled financial planners and delighted no one's family, the US tax code has quietly confirmed that the most efficient thing a long-term Bitcoin holder can do for his heirs is die holding it.

The mechanism — known to accountants as the "step-up in basis" and to David M., 44, as "wait, really?" — erases the capital-gains tax on every dollar of appreciation at the moment of death. A coin bought cheap and held for decades passes to the family as if it had been purchased the day he died.

"So you're telling me," David said slowly, "that the optimal play is to never sell, never spend, and then expire." Informed that this was broadly correct, he nodded with the grim satisfaction of a man who has finally found a strategy he can execute.

Advisors confirm the move beats gifting the coins during life, which drags the original cost along with it and, above a threshold, summons a form numbered 709.

It is the rare tax incentive that rewards doing nothing, forever, with total commitment.

The strategy has one operational dependency, frequently overlooked: the family must actually be able to reach the coins afterward. Analysts note that dying tax-efficiently while your heirs are locked out is, on a net basis, simply dying.