If you want to verify the legitimacy of their FDIC insurance claims, feel free to contact the FDIC.

Also, take note that the FDIC only insures the USD funds in exchanges. Your bitcoin and cryptocurrencies are not FDIC insured. For storing bitcoin and cryptocurrencies, we’d heavily recommend using a reputable hardware wallet such as a Ledger or a Trezor. CryptoSec is not in any way promoting these services, because we think that storing funds in non-custodial wallets are still the best and safest option.