I know there are TenX and Monaco out there, but I'm not sure how profitable are they to hold them and earn from the fees? (If that's in action).
I'm not interested in the cards themselves as I know most of them failed to go worldwide, but mostly in holding the coin to gain fees because apparently, that's the model these cards use. Would appreciate If you could list some other projects out there as well.
I don't understand what you are talking about, it is very bad to invest in a project just because you think that the price of the coin would be high in the nearest future, you might be so shocked that the coin would amount nothing, this is why the main focus should not be on the coin itself but on the project that powers the coin, because this is what investors will focus on before making purchase/buying into any project.