Cryptocurrency is one way of applying cryptography, and the article mentions "Filecoin", whatever that is.

Even aside from cryptocurrency, blockchain, NFTs and that kind of stuff, there's a lot to question when it comes to the ethics of the computer security industry. A lot of it is snake oil, like Firewalls that basically whitelist everything so as not to become annoying. A lot of it is a racket (e.g. you can't get insurance for your company if it doesn't have antivirus software). VPNs basically make money by helping people break the law by circumventing geoblocking. I could go on, but I won't.