The easiest thing is to divide at least the 5 strongest coin assets and 5 coins we can share on the new project, seeing the opportunity that the new project is a very good and promising thing then I recommend dividing the assets into the new project.
basically investing in crypto has a high risk and we cannot avoid that risk, but you can reduce that risk by investing in large altcoins such as ETH BNB and matic.
Investing in new altcoins has a very high risk because the price movements of new altcoins are very volatile and easy to manipulate. so I do not agree with your statement, especially if he is a new investor.
Yes, investing in new coins is not recommended for newbies without any knowledge of the market.
OP is holding ETH as a top coin but if he feels unsafe investing in only 1 coin, he can diversify with bitcoin and possibly more BNB. Absolutely stay away from new coins, although new coins can bring us great profits but think of the risks we will face. Holding ETH, if it were me I would feel safe but for him he is not satisfied means he is not ready to take risks so he should not invest in new coins.