Fiduciary Duty

Fiduciary duty is the legal obligation of one party to act in the best interest of another, subordinating its own. It binds trustees to beneficiaries, corporate directors to shareholders, and, under the Investment Advisers Act of 1940, registered investment advisers to their clients. Its two classic components are the duty of care, acting prudently and diligently, and the duty of loyalty, avoiding self dealing and conflicts.

Why it matters

Fiduciary duty is the highest standard in financial law, stricter than the suitability rules that govern ordinary brokers, and it quietly determines what trillions of dollars can be invested in. An adviser or pension trustee cannot simply like an asset; they must be able to defend it as prudent for the client, document the reasoning, and disclose conflicts. This gatekeeping is why product structure matters so much: many fiduciaries who could never hold exchange accounts or private keys can allocate to a regulated fund. The collapse of FTX in 2022 was, at bottom, a fiduciary catastrophe, customer assets used as if they were the firm's own.

In the gold vs bitcoin debate

For decades, fiduciary caution kept both assets out of managed portfolios, gold as a barbarous relic and bitcoin as an uninvestable curiosity. Gold ETFs after 2004 and spot bitcoin ETFs after January 2024 changed the calculus, and some advocates now argue the duty cuts the other way, that ignoring scarce monetary assets in an era of currency debasement is itself a failure of prudence. Bearer self custody, by contrast, removes fiduciaries entirely, which is exactly its point.