I suggest you to transfer some crypto to cold wallet or at least spread in many exchanges.
do you mean cold wallet on coinbase? do that make difference? i have heard about that but didnt try it!
no i mean an exetrnal wallet.
sorry for the OT
Let me sum it up. If you have significant amount of money in Bitcoin, it's not advised to keep it at Coinbase or any other online service. The money at a web service (exchange, online wallet, ..) is not 100% yours. If anything wrong happens with that service, your money is lost.
For bigger amounts of Bitcoin, depending how much they are used, the advised options are, in no particular order paper wallets, wallets on your computer (or laptop, or smartphone), also with cold wallet or hardware wallet as needed or depending on your knowledge in the field.