Altcoins are most time risky as you said but it may sometimes make you rich if you are lucky. It's not advisable to invest in altcoin but one can gamble through little money to buy some but this money must be a money you can avoid to lose. This can be done after making some necessary research. But remember your research doesn't guarantee you profit on most altcoin.
Among altcoins some meme coins present hyped so they earn novelty of individuals like that of doge coin but unlike doge most of them once pumped but it at no time show the same pumping phase. Trading with altcoins are unsafe but if they go higher then their profit is occasionally higher than that of bitcoin but one have to take the risk with minimum amount so if it escalate then profit will be bigger.
Just hold historical superior coin like that of doge, matic, BONK, Solana and most important altcoin like ethereum. If you search about altcoins then you will find that ethereum is the first priority among all other altcoins so such research can guide you about holding better coin.