Why do you feel entitled to tell people what they should do? How do you know what value - or lack thereof - people get from using Bitcoin&co., have you checked with them, or is it just theory? Why do you assume your sense of value has to be universal?

The 'drugs' traded on the 'deeply depraved' marketplaces save lives and make other lives kind of comfortable even amid a chronic disease. Yes, I mean drugs which should, but for various reasons are not, available in the pharmacy. That's a real use case, do you think it's 'detrimental to society'? Because ill people get a chance to live again? Great thinking.

And to top it all off, your post is worded in a purposely confrontational and inflammatory way. It's a flame-bait, and it got flagged and removed from the site because of this. What do you gain by presenting a biased, unoriginal post to the crowd here? If you think you just made a "net benefit for society" - think again. In solitude, please.