Most annoying counter argument you've ever heard

about bitcoin being legitimate?

Personally, I follow a ton of pages relating to bitcoin/eth on facebook.
And holy fucking shit do I see the dumbest cunts constantly comment on press releases saying shit like:

Bitcoin is a ponzi
Bitcoin isn't a real currency
Bitcoin isn't backed by anything
Bitcoin isn't real
Bitcoin is for idiots
Bitcoin is ripping people off with fake technology

What's the latest bullshit you've heard?
I just wanted to vent a little since seeing this everyday now for almost 3 years is starting to crawl under my skin.
It makes me wish people who didn't have any basic understanding of technology shouldn't be allowed to purchase a bandwidth plan from an ISP.
There are SO GOD DAMN MANY of these condescending twats with their heads up their asses EVERYWHERE.