There is a price cycle in the market. This is a cruel market for novices. You buy at a high price and you sell at a low price. If you don't want to do this, you need to do some good research and improve yourself. Altcoins are subject to much speculation.
This is something that most newbies never really consider because they do not take the time to study the markets.
Most of those that bought a lot of altcoins were relatively new to this market and they did it when the whole market was in the middle of a bull run and since the day that the bull market has been over more than two years have passed and there is still no evidence that supports the idea of a recovery in the market of altcoins and as such most newbies are selling their coins in complete disappointment.