It all depends on the price you buy at.  
Do enough research and you might get super lucky to find a coin that is somewhat new and has dipped to rock bottom with a lot of room to grow.
Being in the right place, at the right time, with funds in hand makes all the difference.

I bought into a coin in Feb/March that had dipped to 1 satoshi, it's worth 19 now.  
Over 1,000 percent in 3 months.  
I expect it to reach 150-200 satoshi by the end of the year as trading volume increases.

My only complaint is that I didn't buy more, but you know the golden rule, only risk what you're willing to lose.

Two weeks ago I bought into another coin at 3 satoshi, it's worth 7 now.  I'm hoping it will reach 30 within 6 months, it's just starting to ramp up.

One thing I'd recommend is that if the coin reaches 100%, take out your initial investment and use it for your next.
It's pretty easy to reach 1000% gains on a basis of 0.