Fidelity is a great option if you want a self-directed IRA at the largest provider of retirement accounts in the US with helpful customer support.
Consider Alto if you want to diversify your retirement assets with alternative investments. Alto CryptoIRA offers more than 150 coins, while Alto IRA offers alternative investments including private equity, securities in fine art, and other non-public securities and pre-IPO shares.
Fidelity
Self-Directed
AltoIRA
Self-Directed