> "Be wary of storing your bitcoins on an exchange or any service that doesn’t allow you to make a local backup copy of your private keys."

I know a couple people who have some bitcoin on Coinbase and aren't too comfortable moving it to a local wallet (Coinbase is just easier for them, they don't have to worry about the security of their personal computer).

Does Coinbase allow making a local backup of private keys? I'm thinking they might not, but maybe they do.