Very sorry to see you ran afoul of Coinbase's cryptic compliance rules. I've heard stories of this happening to people from time to time. I think in general it's a good idea to send cryptocurrency purchased on Coinbase on to some other exchange account first before using it for something. Preferably an exchange outside of the United States or a decentralized one like OpenLedger. I use Coinbase strictly as a gateway to / from the fiat world, and do all my crypto-related transactions from other wallets.