More than 90 % altcoin are scam. So be very careful. Do you know how to find a good altcoin?
A good altcoins usually have a high price because the coin is trusted by many peoples. Many bought their coin and the price increased.
If a new coins created, you cannot know if it scan or not unless you know very well through your own researches and diligence.
Actually there's shit coin with high price too, if the volume is too low, it can be manipulated easily,even I've seen plenty of them being used as a pump and dump tool so the high value doesnt guarantee that its a good coin.
if you want to really distinguish shit coin and good altcoin then you better analyze the overall project not only judging by the value.