There are multiple projects going on in a similar domain. I don't know they really want to help the society with the integration of blockchain or just wanna look "Cool" by adding this term to their spineless projects!
They are running their projects on just one use case and that also framed by them! Just adding blockchain will not help anyone they need to be sure that they are actually solving an existing problem in the current system.

what you think of these 4 projects? all 4 are necessary? are they worth investing? which one is better?