More than 2 years I using coinbase and xapo, not yet problem untill now, but after I readed xapo has problem, I move some my bitcoin to coinbase.
To be on the safer side,withdraw all your bitcoins into any of the desktop wallets.Coinbase is messed up,never know when they can block your account for whatever reasons they claim to be against their TOS. Nevertheless,its not safe to keep your coins in online wallets.Downloading electrum and setting it up is easy as a pie.