MimbleWimble offers privacy by default, more fungibility and better scale-ability of #bitcoin. Since it doesn't support scripts, it would likely be implemented as a sidechain. It is also tied to Elliptic Curve Cryptography and is not well prepared for quantum computing ... yet.

https://twitter.com/ArminVanBitcoin/status/978297525466812418 via /r/Bitcoin http://bit.ly/2J5eiLy