I suggest not to study copycats, this is the truth, study Bitcoin, Ethereum, and nothing else, so that you can get a longer time.
Bitcoin and Ethereum are good investment but they are not the only good coins that are available. There are other altcoins with use case. Most coins in top 20 in both CMC and coingecko are quality coins for a longtime investment. It is better to research through them like BnB is doing good, solana, cardano are also a longtime investment.