That is the most difficult part in investing in cryptocurrency choosing the right altcoin from the numerous ones in the market could be tricky because some of those altcoins that look more feasible for a long term investment presently yet during the next bullrun it price might not pump as expected thus dashed the hope of it investors, however there are confirmed and reliable altcoins that worth investing on however profits expectancy from it investment might not be much yet they are more trusted and credible though a lot of investors wanted investment in cryptocurrency that can generate 100x, 50x etc profit during the next halving but forget that investing in the wrong choice is very risky.
Yes you are right choosing the right altcoin in the cryptocurrency market can be a challenging task. Investing in confirmed and reliable altcoins may not yield significant profits but they offer more trust and credibility. It's good thing to remember that investing in the wrong choice can be extremely risky. So always choose wisely.