I have a lot of friends who accumulated GRIN already. But they left the project after this news.
Besides, I'm really sorry about the news. Mimblewimble could be the next generation of privacy algorithm.
Grin was always a bad investment and not because of this clickbait non-news. Its coin emission rate is not suitable for holding, at least not until a few years down the road when/if the percentage of newly created coins drops below the level of adoption growth.
It wasn't for me anyway; I didn't invest in Grin or Beam.
However, some of my friends found the Mimblewimble algorithm successful and invested in these cryptocurrencies. I talked on behalf of them.
But I have never found the Mimblewimble algorithm useful. Monero and Zcoin have much more powerful privacy algorithms, I think.