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.
I dont think so, because in investing you just have to read a lot and knowed the project of the coin. No matter where you investing, you will get profit on good project, but you have to know the team too, before you invest your money. Keep believe in your self, because many people doesn't believe on bitcoin before reach 17000$.