MimbleWimble, Beam and Grin: What’s the buzz all about?

It’s not very often that a new cryptocurrency protocol receives so much attention from Bitcoin community members. And if we’re talking about altcoins, the chances for BTC maximalists to get involved are even lower. However, MimbleWimble and its two resulting coins (Beam and Grin) are different. Cypherpunk Jameson Lopp has tweeted about running Grin, some exuberant miners have joined the rush for private gold, and one trader has even offered as much as 10 bitcoins for 0.001 GRIN token