No, it will never be used anywhere in any business.
Everything GNU and FSF does is driven by ideology, and there’s billions of dollars that will will make sure businesses never use or accept anonymous payment services of any kind of those businesses don’t want to be charged with money laundry and all properties confiscated.
But only if they use payment services that are not part of the banking networks with verified account names.
Pay for an online number, there’s one time phone number websites you can use, but services are getting better at detecting if it’s a real cell number and block VoIP numbers.
It’s good to be leary to give your number to a business or service for privacy, but there’s no valid reason to obsess about individuals getting you number on a social level, you’re not important enough for other individuals to start bothering you simply because they got your number. I have a business card I give out with my personal number. However it also means you can’t use plain texting because other apps on the the other person’s device will see from your text message that this is a live number to track and spam.