Has FDIC ever failed to cover anyone? As for storing youre own keys, thats the equivalent of keeping your money in your mattress. House burns down with your wa

Has FDIC ever failed to cover anyone? As for storing youre own keys, thats the equivalent of keeping your money in your mattress. House burns down with your wallet. Bye bye money. As you mentioned storing you key in parts at multi locations if you have money and knowledge. Would these locations be at a vault at a bank?