You have to be careful, my friend. People will always tell you their wins but never tell you their losses. So, the first thing you should do when someone tells you a certain gem will do 10x, 20x, 100x or more, go out and do your own research on the coin.
What you should probably be looking out for is the team behind the gem. Are they doxxed? What experience do they have in the crypto space? What they're building, is it feasible? Is it marketable? Does it solve a particular need for a large section of people?
These are some of the questions you'll want to ask yourself before apeing into just any token.