"Rocket Dollar" is a self-directed IRA and 401(k) provider that has been in operation since 2018. It offers a high level of portfolio flexibility and is ideal for experienced investors looking to diversify their retirement holdings. The service leverages a unique account structure, creating an LLC for each client that provides the ability to invest in any type of asset permissible inside an IRA. This includes real estate, private company stock, and other more exotic options such as crypto held in a private wallet and traded on a decentralized exchange. However, their account management fees, which include both a one-time setup fee and a minimum monthly fee of $15, make it better suited for balances above $25,000. It's important to note that while "Rocket Dollar" lets you invest your IRA or 401(k) in unique ways, its fees hold it back somewhat. Therefore, it's best suited for experienced investors with a high net worth.