There are several Health focused YC-clones: Rockhealth, Healthbox, Blueprint, etc.
Also it's not clear what "Etsy for IP" means, there are already stock photo libraries, sites for selling code snippets, sites for selling brandnames, etc. Is there a particular type of IP you're thinking about?
Health focused YC clones are out there, there are no bio tech focused ones though.
On the Etsy for IP. I never felt much of a community with stock photo websites. I suppose this site would pull together all forms of IP under the platform.
In general, I think in the startup space, even subtle variation on the idea and positioning (given great execution) can lead to a winning startup.