I don't think that for a serious project it will be hard to appear on coinmarketcup. This is the most important obligation after the commencement of work.
I'm not happy with the coinmarketcup platform, but for some reason many investors trust it, I think that every project should appear there.
Of course, each project must appear in coinmarketcup is an indicator of the project as a full-fledged cryptocurrency. It's credible.