You should think of it again. Most of the doubtful investors are thinking the same whenever they see an altcoin starts to pump but I tell you that it isn't a good time to get in if the coin starts to pump.
Good point why invest on coin that is already started to pump, why not buy it before that pump we all know whats next on pumps.
If you are looking for altcoin to invest try to look for a good coin that you know and start buying on their deep.