Q&A Livestream: Your privacy & security questions answered! (November ‘24)

So when I shop online at the moment I’m just using my debit/credit card online as standard as most places don’t take cash/crypto, and vouchers aren’t available on many of the sites I use.
I know shopping online more often than not is not going to be private from your bank just due to KYC and other banking legislation (unless you can use cash/crypto/vouchers), but i’d like to increase my privacy/security from my details being stolen in attacks/leaks, or maybe even preventing a site tieing one account to another. It would be nice to prevent the bank seeing too, but as far as I know that isn’t possible without the previously mentioned methods.

Being in europe privacy.com is annoyingly out of the question, the closest to that I’m aware of is Revolut, PayPal, google pay (not apple pay as I am not in that ecosystem) or just a secondary bank account that I add funds to as and when I need to pay for things (you can’t steal what isn’t there). Paypal and google being so generally data hungry I feel it would be better to try and avoid?
Of all these options (and any others you are aware of) what are the pros and cons to these options for privacy and security? To be clear I’m not asking what service i should pick as you probablyndont fully know my threat model, but I don’t have enough knowledge to make an informed decision.
I must admit when so many people online try to act like an expert (or falsely claim to be) and there is so much (mis)information out there, I find it hard to know what is true or false. It is one of the things i appreciate about you guys, that if you aren’t sure on something that you’ll at least admit that before trying to help.

Also the data collected by your bank, I know they know how much you spent, where and when, and if you swiped, used contactless or chip & pin, but can they find out exactly what you bought, or do they just have to determine baised on the meta data?