The problem with Grin is the built in Inflation, which defeats the entire purpose of a decentralized crypto currency, and turns a project into
an instant joke. Already there has been a fork to remove this fatal flaw in this project, this Crypto (and anything with money like properties)
can only become viable once it eliminates its inflationary problems...
That is what was interesting my person the most in the Grin project and I see more and more people are aware of not good coin economy.