The brokerage firm offers bitcoin (BTC), ethereum (ETH) and Litecoin (LTC) to any U.S. citizen over the age of 18. The assets are custodied by Fidelity Digital Assets and held in a cold wallet. The crypto IRA product has no fees, and customers can invest in a Roth IRA, traditional IRA or rollover IRA, according to Fidelity's website.
