Buying any coin using your credit card will bring a whopping 4% fee. Sold bitcoin after a spike and want to cashout? Another 4% if you are planning on using the PayPal option! Even the cheapest option being the Bank Account Transfer will run you 1.5% selling and buying! Now that may not seem like a lot, but if you are planning on making a sizable investment, this adds up. For me, that fee hit me for $75 during my first big investment. The solution to getting around this fee is simple enough; use GDAX.