A Bitcoin custody firm has generously offered to relieve the nation's families of the heavy burden of holding all of their own keys — proposing instead to hold one of them itself, purely as a kindness.

The arrangement, marketed as "collaborative custody," is collaborative in the sense that the family and the company each hold a key: a partnership in which only one partner has a compliance department, a quarterly earnings call, and the ability to be acquired.

"We're not a custodian," the firm clarified, holding a key to the customer's money. "We're a co-pilot." Asked who flies the plane if the co-pilot is acquired by a larger plane, the firm scheduled a follow-up call.

Competing products were reviewed. One backs the dollar value with a Lloyd's-of-London policy and a premium that grows with the vault. Another routes everything through a chartered trust company. A third — the Bitcoin IRA — simply holds the keys outright and is at least upfront about it.

"Not your keys, not your coins" — a phrase, it turns out, also available for licensing.

Each, observers note, solves the real difficulty of inheritance by reintroducing the one thing self-custody existed to remove: a company in the middle.