You don't have to invest in altcoin if you are worried if the altcoin can't profit. You can only select bitcoin for your investment and never check on the altcoin market. You can buy bitcoin as many as possible because that is the best investment in the crypto market. You don't have to analyze more about the altcoin because you already have the best investment.

But if you are willing to invest in the altcoin, that can give you additional profit in the future because the altcoin will rise after bitcoin touch the high price. I suggest you to try to analyze the top 10 coin list at the coinmarketcap or coingecko, so you can get the good coin to invest.