in this case if you do not want to take a high risk then it is better to choose the top coin and not the new coin.
True. If we are not really sure to buy new coins, it is better to buy top altcoins. There are many altcoins that can be chosen to be a safer investment such as ETH, BNB, ADA, DOT, XRP, TRX, XLM, MATIC, LINK, or another top 50 altcoins. These altcoins are safe enough to buy and hold because they have already big market caps and are listed on many top exchanges. They are also supported by big communities to make the popularity of those coins growing well day after day.
New coins are sometimes difficult to develop and also do not last long in the market.
It should depend on how good the team members of the projects are, in applying a proper strategy for marketing or promotion. That's why we must learn the whitepaper carefully, check the team members' quality deeply, monitor the project's progress, and see how the response of the community on the projects. If all of them look good, I believe the coins will last a long time on the market.