Nowadays its not a good time to buy altcoins.
Market is not stopping and falling without a stop so wait for a price action not a bounce.
The right time to buy altcoin is when the bitcoin price is in low price so that you can get great profit in the future,so you need to always check the bitcoin price and then you make sure that your choice can give you a nice outcome and you need to research also for you to know more about altcoin so that you can choose best ico.