The person who blasted the crypto people with UV was not using far UVC.
Lots of "toxic" things are beneficial for public health. I'm sure you could poison yourself with soap but we put it in every bathroom.
Like with soap, it does not seem plausible that you could unintentionally harm yourself with far UVC lights.
This is dangerous misinformation. Like any toxic, it's the Dosis that kills
There are very powerful far UVC products available which will give you sunburn on your skin in a couple of seconds
Somebody blasting UVC in a room of people is crypto monkey level of stupid