its impossible to know.. not only does every trade give different percentage opportunities, every trader will enter and exit at different spots.. take ETH for example.. two days ago we hit $135 and now its trading at 210, thats a 55% return in two days!!! will you buy the perfect bottom and sell the perfect top, not likely, but you will make some awesome percentages in there somewhere, here are my buys and sell on this last dip: