Mining and Holding altcoin does not guarantee success. Also how will you ROI for a year if the prices of what you mined does not move at all? By the way what are the altcoins you mine that you are expecting to grow a 100% in a year? What process did you use in picking that altcoin to mine? Trading also won't insure 10% gain per month, life for the month of August - September 1 the prices only move from 560-580$ at what rate will you get the 10% gain in one month?