It's funny how you guys keep mentioning China PoW ban and only see the ban not the afterwards. This supposed "impact on the grids" never existed as it is evident from China and how their energy crisis didn't even change. In fact the stats suggest after China banned bitcoin mining the electricity usage kept on rising instead of having even a small drop!
Basically when it comes to this news you only ate the FUD and didn't even analyze what happened. For example the fact that the hashrate drop was very small and didn't change anything apart from affecting newbies who believed the FUD to panic sell and cause a crash that led to a bigger drop in hashrate than the ban itself!
The meme @n0nce posted is very apt.
Saying that crypto mining has no noticable effect on the grid is like saying that cars cause no pollution, it's just false, from the hashrate you can estimate that Bitcoin currently consumes around 110 Terawatt Hours per year — 0.55% of global electricity production and that's just for BTC, there is ETH which also consumes so much electricity, LTC, BCH...etc