New projects will provide greater profits than old projects, this is true. but the risks are also greater. It all comes back to your own analytical skills and experience, if you have a lot of experience in new projects by looking at the type of project and doing research, you can invest there.
New projects brings good profits if you buy before they get listed on the exchange, like when you participate in the seed round, the presale and also in the public sale, you tend to make quick money when listed on the exchange and when you hold, you might be lucky it will go very well in the future because good project never go below the listing price and for that your investment is safe.
However, there are some old coins that has made a good run of there money, I know coins like Solana, injective protocols that had the moment of this bull run and they made a lot of profit to many people than the new listed coins.