What is the single biggest difference between the world of crypto, and the Legacy Financial System (banks, credit cards, etc.?)
If you want to pay for something online using the LFS, you're most likely going to end up **giving them private information**, like the bank account, credit card number, social security number of your strawman, or your address. If you don't, it's because you're paying with some other corporation like Paypal, who already has complete control of your funds...
In crypto, the vendor gives you an amount and their public receiving address, and you send a transfer from your end. Neither one of you has exposed access to your funds. If you're smart and using a privacy coin, then neither one can see the other person's balances & history (like they can on Bitcoin, Dogecoin, Ethereum, and all other transparent chains.)
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https://www.youtube.com/watch?v=pW8jXuUIwF8