Fortunately, USD balances on GDAX are FDIC insured for US citizens [0]. I accept that I might not be able to cash out of cryptos in an emergency, due to liquidity or transaction times or something else, but I sure as hell will be able to get out any USD I might have in GDAX, which is a big confidence boost to me. They claim that all crypto deposits are "fully insured" as well, by a "syndicate of insurers through Lloy…
I am also doubting if FDIC insurance is for the full amount, or the 250K that's often cited for banks.