Diversification is important because it decreases your chance of losing more money but you should not forget that the selection of coins is in your hand and you will decide to choose a profitable coin or scam one therefore explore the characteristics of coins in which you are interested in investing.
I agree that diversification is necessary. Sure, if you diversify assets with some trusted coins, it may decrease the chance of losses. But if we only diversify assets with random coins, I think it won't help anything. It only adds more coins into our portfolio but it won't strengthen the assets. And we also should realize that diversification will increase the chance of higher profits.
Ethereum is the top coin among altcoins and one should not forget to invest in it as after Bitcoin Ethereum has occupied the top position in the crypto market. The Solana is going as a successful coin and demand for it is still elevated so catch up on the opportunity to be rewarded in this bull season.
Bitcoin, Ethereum, Solana, Cardano, Polkadot, BNB, and Toncoin are some coins that we can diversify assets with them. As long as we diversify with these recommended coins, no doubt it will decrease the chance of losses. However, we must understand that we must always monitor them, analyze the potential raise or drop in the future. Sometimes, an issue can change the price immediately and significantly.