Shit. Do some research. If you trying to pull a lot of money out, all of a sudden there MIGHT be problems. Seems to be no rhyme or reason to why they fuck with some people and not others. People have even had their accounts closed without any reason given. Money still in them. Customer service will take weeks to respond.
Never happened to me, but I've heard way too many horror stories. A cat on BGOL got their money hijacked by coinbase when trying to withdraw. Think it was like 5k.
So if you taking like $20k out, it''s best to split it up between coinbase, bitpay, and bitstamp. Some even use localbitcoins.com. That's why folks should split up how they buy in. You just don't want to show up on bitstamp trying to take out 7k. They will ask where you got the bitcoin from because of all this aml/kyc.
These places good for the 'source of funds' bullshit when trying to get your damn money. You can never, ever, have too many places to exit with your own damn money. Government seems to want to push all the cattle through coinbase.