There have even been many alts no longer working and we should really find out before buying and holding them long term.
We need to learn more about blockchain technology and its related trades in the crypto market.
The more knowledge, the less mistakes will be.
I agree, be careful when HODL altcoin, especially cheap new coins, because if it is eliminated in the trade, the coin has no value, meaning your money will be lost.
It's better to buy altcoins such as TRX or XEM which are overcrowded on exchanges where the price is also good for trading. Even the profits obtained are not inferior to bitcoin investments, because less capital is needed.