depends on what altcoin you mean, because in my opinion not all altcoins will survive, so my advice rather than investing in altcoin is that you better invest in bitcoin.
investing in Altcoin in my opinion is good, if we invest in coins that have good potential and if long-term investment is very profitable, because among Altcoins I'm sure there are good coins. which has proven to be good and has good potential, namely in Bitcoin. but in my opinion, Altcoin in the future can be better and grow better because of increasingly sophisticated technology in the future.