for physical products… it looks like Newegg still supports Bitcoin. overwhelmingly, the more tech-adjacent the product, the easier it is to find vendors that accept cryptocurrency.
If you invest in gold, you won't be able to even gamble with it. In fact, you won't even have any gold at all. You'll have a certificate from someone claiming that someone else has your gold stashed somewhere.
Privacy is a lot like other civil liberties, it feels ideological and airy-fairy until you need it and don't have it.
Take for example web hosting. I could have paid for the website that we used to lambast the Minneapolis police department and argue that they should not have access to the toys they want using a credit card, but then the Minneapolis police could send a sternly worded letter to the webhost and learn where I live. Which is a reasonable consern if you know anything at all about the Minneapois police department. So I pay for webshosting with cryptocurrency.
That's a real clear cut example of why financial privacy matters, but that same concern extends to pretty much every thing you do online. Cardinal Richelieu has the right of it when he said "If you give me six lines written by the hand of the most honest of men, I will find something in them which will hang him", and recall that The US government kills people based on metadata. Its easy to dismiss me buying a box of candy as not important enough to worry about, but its the entire history of every financial transaction you make that paints a very accurate and very useful picture of who you are what you get up to that is of great interest to people who can do you real harm.
This is patently untrue. When I buy something with cryptocurrency, its not because I don't trust the merchant or am doing something illegal, its because I care about my privacy and dont want a huge list of my financial transactions available to visa/mastercard/paypal/the government, and I don't want to schlep to the gas station to buy a prepaid debit card with cash, which is the only other way to maintain a semblance of financial privacy if you want to buy things online.