Just as said, include those projects that you have worked for since they are already a lot to say if they were 5 projects already.

It is more appealing if most of them are successful but regardless of that, you have the experience in working with crypto projects.

Another thing is to find them on other freelance marketplaces like Upwork and other the same platforms.

IIRC, you may find then as well in LinkedIn. Just try to search for the right keyword based on your niche.