they have advantages both in technology, demand and sales, and if there is a decline and increase in prices are usually based on BTC prices, but sometimes there are different but only briefly and return to the movement of BTC.
so if you want to look for big profits in the short term, play on the ALT pump and dump, you will get used to seeing it when you often see coins listing in a market and experiencing unnatural ups and downs.
Are you continue buying if the price drops ?
Have you got the limit when you wanna sell the tokens if the price drops too low, i think exit price is needed also in cryptocurrency trading