...what do you think causes people to behave like that, namely always buying at high prices,? but when the price is cheap he doesn't want to?
The main reason when a coin is bought at a high price is greed. In such cases, the beginner is possessed by Fomo and he calculates how much would be able to make a profit if he held this coin. When the price is low, fear is the main reason not to make purchases, as the price may decrease even more.