Not sure why you are so up in arms because of a $20-30mil market cap alt.
Nobody really bought it, but you could have mined it on a video card, which is not really possible with other coins.
It's too difficult to use, hence it is mostly a developer toy. Plus, it has high inflation in a first few years as supply is growing linearly (at around 63 mil/year).
Not really anonymous, either.
Yeah. People do not understand that the innovation in MimbleWimble is not the "privacy", but the potential for scaling with a lightweight blockchain. I think that is why so many bitcoin talk OGs were interested.
But it is unproven tech, and Grin is the proving ground for better or worse.
It's economics are also interesting. And in some ways obviously not designed for competition with BTC. I have never mined, nor bought a single pip of Grin, myself.
I find people's obsession with alts failing to be a telling thing about someone's security when it comes to Bitcoin's place as the lindy project with network effect.
In the end we HAVE to do the experiments.
Some coin HAS to try to be a world computer and do all calc on chain. (ETH)
Some coin HAS to have no blocksize limit and store all kinds of data on chain and centralize. (BSV)
Some coin has to have inflationary monetary policy. (Doge?)
Some project has to have an opaque base layer, and be capable of truly private use. (Monero?)
ETC ETC ETC
Grin gets to try to prove out mimblewimble.
And then there are all the projects that have no purpose because they try to compromise on one or more of those aspects in the name of "moderation" (BCH?).
We simply cannot live in a world where BITCOIN exists as an open source distributed ledger tech attempting to become money where competing forks and copycat software does not exist. Can't have both of those things.
It sucks for those of us old enough to have less life left to live as this stuff works itself out... but it has to work itself out.
My bet is on Bitcoin. (Well, and I do keep a Monero side bet so to speak... I just list that here to make JJG froth)