I use it everywhere where it's an option (so not very often, let's say once a month). I also only use privacy services (vpn for example) where you can pay using cryptocurrency, otherwise what's the point
There was a sketchy looking file sharing website where someone had posted some incredibly hard to find audio tracks that I really wanted, but the website required a subscription. Paying with a cc meant automatically-recurring payments, but I paid with bitcoin, got my files, and knew the website couldn’t get any money from me after that.