If you want to invest in this market, I can definitely advise you to invest in Bitcoin. Investing in Bitcoin will definitely not hurt you like that The current market is completely out of the analysis of the people.Invest in Bitcoin directly instead of investing in nonsense coins right now. In addition, Ethereum BNB can buy and invest all these coins.
Bitcoin is the first choice for the long term if you want to make a profit. Of course they probably shouldn't ignore all the good potential altcoin like ETH and BNB as they both have great use cases as altcoin. If they want then they can also diversify their assets to some of the top altcoin but if it were me then I would choose bitcoin which dominates the portfolio for long term investment.
Granted, no one knows about the future of this crypto asset, but things to consider such as increased adoption should be the reason why bitcoin deserves to be in an investment portfolio. However, they still have to consider the risk that they should only invest their money to what extent they can afford to lose.