The issue is that the US government quickly dismantles any business that allows such a thing. Literally every single US based service ever that has enabled irreversible fast payments has been shut down. I'm not joking.
Good luck with "shutting down" Bitcoin.
I'm really hoping the US is so blind and short-sighted to officially outlaw Bitcoin, so a) Coinseeker and his likes stop using it because of that mental illness named "patriotism", and b) they learn in the very hard way that Bitcoin was designed to be resilient to both bans and regulation.
Anyhow, I guess all the financial institutions and their sockpuppets (AKA the three-letter agencies) have looked into it and realized they cannot just ban it, so they will play their cards differently.
Well, so far Bitcoin or should I say the infastructure Bitcoin needs to be anything more than a speculative and black market sideshow, is losing that battle. And DHS only served ONE warrant. Talk all the big guy trash you want but people with actual businesses, fear the USG and FinCEN regulations are preventing any real launch of Bitcoin. So Bitcoin's "resilience" is only in your own mind.
Look at the ATM's. There could be thousands by now...but these people aren't going to jail for it. Businesses are voluntarily closing or rejecting US users because they know the truth. All while you simply sit on your computer and pretend to be "hardcore", living in a delusional world that only sees Bitcoin increasing in value, even if no one in America can legally access it.
And please don't give me that, "the US isn't the whole world" nonsense either. If there rest of the world was even remotely close to the volume of the US, the markets wouldn't be dead all night while you wait for us to wake up and of course...lead the world.
