if I think personally a safe way to invest in cryptocurrency is :
1. the project runs according to the roadmap and whitepaper that has been made;
2. cryptocurrency that we invest in already has a product;
3. the team always updates about the progress that is happening in the project that we invest;
4. invest in project that are in the top 1-500 in coinmarketpcap (have a high volume);
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.
running for long time, can you give me a specific time, maybe two years, three years or more my friend ?
and sometimes you should look to a new project too, because if you can choose the right one, you will get an opportunity to grab a good project from the very beginning and in cheap price too
regards