I want to ask that can we create gig of writing greeting cards on fiverr?
Sure, there is the category Postcard design under Graphics & design.
If you type " write greeting cards" in the search bar on the main Fiverr page you will find several gigs offering this service.
The OP offers to write articles so I think this is a writing rather than a design gig.
@pacquo, I’m not interested in designing greeting cards, I want to write greeting cards.
Sure you can, though I’m not sure it will be worth it. There are several gigs of that kind, so it’s not like you’d have to compete with thousands of others, but all these gigs are barely getting any sales.