In my humble opinion what really matters is skill. Since you can trade on the spread I don't see why even an amateur would loose in the long run. Just think about it, the only people that ever "lost" with Bitcoin are those who bought over 1100$, the rest of us had more than one chances to sell and profit. Now if you combine this with some propper skill there you have it, a profitable recipe.
well right skills is your main gun inside trading it will serve as your main resources in order to make good decision on how to place your entry and exit point but together with luck it will be more successful and more profitable in the end.