You can't make a cash transaction over the internet - there's nowhere to insert the folding stuff...
So, your only options are bank translations (Credit Card, bank transfer or similar), or, using crypto. Bank transactions are tabulated on their sites and anyone working for that bank can access those details and see which haunts you frequent and how often.
However, with crypto, "You are your own bank" as the saying goes. You can have multiple wallets and out of those wallets send funds as you please. The block-chain doesn't show who controlled which funds and at what point, so it would need a mechanism to tie one transaction to one person then work out where those funds went. With confirmation something of a formality, (especially with lightning network transaction which add a level of privacy to those transactions) people can make online transactions securely and the merchant knows the services have been paid for.
tool for them to use and this cant really be attained nor cant be done if using up your own Credit/Debit card.
Even though people saying here that there's no market for this one since people would just simply search up for free sites but still there is a market for those who are really
looking for privacy with more features that they can possibly able to get with premiums.