I mean, yeah this is already done. Over $10,000 requires you to file a FinCEN Form 105. The point isn't "you can't send money" its "The US government only wants to allow systems to exist in which it knows who/what/when/where about any non-trivial sized transaction."
If there's an auditable/subpoenable record, they're happy. If not, they're not. Right now they're "not happy" about XMR. Some day they'll ban it.
As for ETH/BTC<-> XMR they'll probably ban that too. Not from a technical perspective but more like "if we catch you sending ETH to that Russian XMR exchange we'll prosecute you."
Honestly banning cash would be one of the easier things to do, but I don't think what you've said is necessarily true.
I cannot offer legal advice here, but my understanding is if Bob in NY has the fantastically idiotic idea to send $100k through the mail to cousin Suzy in CA, he wouldn't be violating in laws by not filling out the 105 or IRS 8300. He's not engaging in a trade/business and the money is not leaving the borders.
I meant internationally, domestic cash transactions don't currently have reporting requirements per se. Most domestic cash mails would eventually reach a magnitude large enough to meet a reporting requirement for sales tax, 1099-MISC, gift tax, etc.
I mean, yeah this is already done. Over $10,000 requires you to file a FinCEN Form 105. The point isn't "you can't send money" its "The US government only wants to allow systems to exist in which it knows who/what/when/where about any non-trivial sized transaction."
If there's an auditable/subpoenable record, they're happy. If not, they're not. Right now they're "not happy" about XMR. Some day they'll ban it.
As for ETH/BTC<-> XMR they'll probably ban that too. Not from a technical perspective but more like "if we catch you sending ETH to that Russian XMR exchange we'll prosecute you."