In April, Fidelity Investments reportedly announced it would allow investors to deposit bitcoin in their 401(k) pension accounts through a dedicated “digital asset account,” with MicroStrategy reportedly being the first to register a bitcoin 401 with Fidelity. (k) Fidelity says it has seen strong interest from employers for pension account companies and expects more to follow in the future. Employers considering adding bitcoin to a 401(k) plan will need to conduct due diligence and obtain the necessary approvals, which Fidelity can do in about 90 days, according to people familiar with the matter.