Don't bet on it! I've been using TransferWise [0] recently - it's cheaper than Bitcoin as its fee is up to 1%, which is lower than Coinbase and all fees (and possible losses due to rate fluctuations) associated with buying on end and selling on the other.
Disclaimer: [0] is a referral link, which will give you a free transfer up to 3,000 GBP.
Disclaimer: [0] is a referral link, which will give you a free transfer up to 3,000 GBP.
[0] https://transferwise.com/u/eb4f