My credit union also lets me generate single-use debit cards,
I've never heard of that before, but i'm pretty sure that can be traced pretty quickly by a gov't. I'm going to assume that anonymity is not your reason for doing so.
I'm also going to assume you're in the US, and as far as I know, there's nothing "sketchy" about buying a pre-paid visa with cash, nor paying for a VPN with it.
I can appreciate doing as little online purchasing, banking etc., especially these days, and I think the whole Covid cr@p that everyone went through got more people purchasing online than ever before.
Which goes hand in hand with what's coming up next with
FedNow
And
here, which is instant knowledge by the gov't of all transactions using it.
Not going to go into conspiracies, as this is posted in the "security" forum, but nothing good can come from this, espically if/when it becomes the mandatory way to do business.
That's a tough story about crypto. About as bad as when I bought 100 American Gold Eagles (1oz each) at $375.00 per ounce in '03, and then sold them later for $500.00 per ounce later thinking I did pretty well back then.
Hindsight is 20/20 lol