Today, I sold ripple at around 640 for a profit of around 30%. It was a good trade to make:)
If you make 30% profit per transaction, then you will exponentially grow your money. However, the important thing is you should never make a loss. Making a loss cuts on that exponential growth.
If you rinse and repeat 30% profit 10 times, then you end up with 13x the original amount you started with. So, if you started with $1000, it ends up being $13,000. That's the power of exponential growth.