There are many great projects below top 100. As we speaks this list makes clear there are still altcoins under 100 which are profitable. Maybe not for the long term investment but for day to day trade:
Source: WorldCoinIndex
Source: WorldCoinIndex
There are coins that being pumped as there are still small groups who are playing around. It's needed to look deeper before you invest your money,
there are bots and manipulators around every exchange.If you failed to investigate you'll be easy getting trapped
and lose your money.