Try this. Go to your local back and make a withdrawal of YOUR MONEY... After all it is your money, and see what happens if they tell you Oh we are sorry but withdrawals are delayed and you will get YOUR MONEY in 6 weeks... Yea right..
It's called a bank run. Happens quite often.
You are correct Voogru. Consider this as a bank run. Coinbase is pretty good with bank deposits/withdrawals.