The new coin can offer higher returns than the old one, but it also carries more risks, so it needs to be researched carefully before investing.
Coins that can return high returns are old coins that are already very well known in the market, not new coins whose foundations and community are still less strong when compared to old coins such as BTC, ETH and BNB examples.
If in the long run old coins can still be profitable but do you know old coins like BTC, ETH it has increased many times even tens of thousands of times, so to be able to make a high profit with old coins is very difficult. Holding legacy coins reduces risk and makes our investments safer.
On the contrary, new coins have low cap, so the possibility of a high increase is possible. If it is a potential coin, it will also appreciate as much as the old coins did. But investing in new coins is very risky as you say because the community is less strong and less noticeable. Therefore, choosing to invest in new coins is not easy.