There's a rumour it's China this time, apparently one of the biggest banks has stated they will systematically close and report any account that has crypto dealings.
Seems like it's plausible this is the explanation this time, but nobody can be 100% sure.
It's not going to last that long, their banks don't reach the whole world, buy now and see for yourself that the prices are going to go up again. China has always been a big contributor to FUDs but there's no long lasting effects that have been felt right now.