I think Byteball is a very innovative cryptocurrency, and quite underpriced for the level of development the currency has right now.

For you who looks for a project with social benefits, it brings conditional smart-payments, which opens up a range of possibilities in the insurance sector.
It uses a new consensus mechanism (DAG) to allow the best possible level of scalability. It has already a very user-friendly wallet, and development happens continuously. so keep an eye on it.