There have been many coins arose, I myself have earned more than 20x on a coin (prefer not to mention which one) but yes, it was a great feeling when I turned BTC0.2 to BTC4 in not more than a month.
But always remember, every coin has its days, when you are in at the right time, you will make, either you might break.
True, very few coins stay at that high level reached after fast pump. In 90% of the cases, there is a dump. Look at BTC, LTC.....