I would recommend Revolut.

It is a virtual mastercard which can be used worldwide without fees in exchanges of fiat (real money).
They are A company of Barckley's Bank with offices in UK.

This week they added Crypto's for premium members and next days they add them for all.
With a fixed exchange fee of 1.5 % for crypto's and no hidden fees  is really decent i believe (depending the amount of transactions you will be executing).

Google about revolut and you will see how great it is.I am not somehow payed by them or advertising them. I just have found it very handy specially now which  they add crypto exchange.

If you intent to be a day trader then i would suggest Gdax.

Just my 2 cents opinion.

Regards.