The most popular cryptocurrencies for investment are Bitcoin and Ethereum:
Bad news for all the Bitcoin maximalists still hoping Ethereum will one day die. It's already completely entrenched among exchange traders, not to mention DEXs. Now, institutions as well. It's going to perform wonderfully in the next bull run.
Thats fine and all but eth goes as bitcoin goes. What happens when bitcoin completely tanks? What happens when bitcoin completely bulls? Bitcoin pulls the strings of every other currency. Investors usually don't put all their eggs in one asset class into one product. People who buy gold usually buy silver too. Etc etc.