It is very important to evaluate the future potential of the coin for successful investment.
To do this it is necessary to carefully monitor new projects and check them.
To do this there are special funds like this
https://twitter.com/dao_kronos/status/1506198003060719621 that invest money in new and prospective projects.
Now there are a lot of new projects and sometimes it is very difficult to find new and prospective projects for investment. To do this there are investments funds that allow to invest money in new and prospective projects without special knowledge.
Usually when cryptocurrency market rise many altcoins rise too.
But it is necessary to create a project that is really necessary for people and continue to develop such project.