I'll say the best coins for gain x100 its - below a million capitalization, I'm looking for such. Very good XMCT. 250 thousand total capitalization but the team is actively developing the project. New 3 new exchanges until the end of 2019. One team confirmed the following week.XMCT great project
I do not have such confidence in any of the existing tokens. The time, when altcoins used to pump is over. Now, tokens that will gain, will not add too much to their initial price fast. The best ones will be going up slowly.