Coinbase's buy mechanic is very easy and allows you to not have a bunch of money stuck inside an exchange. You pay for the pleasure, of course, but if you aren't dealing in big money the fee's are negligible. Once you have your btc you can move it anywhere. I'm fully verified so I can insta-buy $1000 in BTC a day if I like which is more than enough for me ($1000/wk instant buy limit).