Simple...
A lot of people enter the game with 100-200 usd to test it. If one invested in btc 100 usd when it was 12000 and sold it when it hit 15000 it had a profit of about 24 usd...
What if you have invested 100 usd in ripple when was 0.23 usd and sold it with 3 usd...?
Yeah...about 1200 usd profit over a month with ripple.
Choose altcoins! Choose you profit!