The coins with potential to 100x you can find in the interval of 50-150 of coinmarketcap, but you should look for it carefully, because the are a lot pump coins which have no promising technology.
If you want to obtain 100 times your investment I think you need to go a lot lower, even those coins still have a very high market cap, you need to invest in projects that at most have 10 millions as their market cap, I know that can be very risky but if you really want to obtain such great profits you need to take huge risks.