I'm a newbie. I have increased my BTC more than 10% a week. I invest in a single coin. That was in May. I bought GNT coin after a week I had 18% profit. But that was my only chance
It is possible with of course different unique strategies of each individual. Choosing a good coins will help you to achieve that 10% profit. Always track down the movement of bitcoin when you are trading some altcoins. Most of them are just following what btc movement does.