if I think personally a safe way to invest in cryptocurrency is :
5. the project we want to invest has been running for a long time (if I personally never invested in a new project), because investing in new project has a greater risk than we invest in old project.
This is the whole point, it would be interesting to receive instructions for a new project, the risks are greater, but the reward may be greater, since for old projects the price of a coin is already established.