We can add several options to other altcoin choices but many investors stay on top coins for reasons of certainty of rising in the bullish period, because there is no guarantee that other altcoins can survive after the bear market passes and other factors due to the effect of the Luna crash so not many long-term investors believe coins other than BTC, ETH and BNB.
Regarding some investor actually will invest on top altcoin seem BNB, LTC, ETH and Bitcoin. They have reason why keep investing in top altcoin because guarantee when price going dump back to higher price. Luna crash happened with not trusted developer and this most important points for investing actually with long term. Have potential top altcoin for investing and need to know about reputation from developer, will be the same like Luna coin developer? Good choose invest with top altcoin only and seperated portfolio fund each coin about 40%