In March 2026, the U.S. Department of Labor issued a proposed rule clarifying that 401(k) plan fiduciaries may include products containing alternative assets like crypto, private equity, and real estate in the investment menu under a process-based safe harbor. This article reviews the rule's background, core mechanisms (the six-factor prudence test of Performance, Fees, Liquidity, Valuation, Benchmark, Complexity), its place within the Trump administration's crypto policy under Executive Order 14330, and the potential impact on the crypto market, fiduciary compliance pathways, and 401(k) tax incentives.