I don't see much reason to have a Bitcoin business in the US unless you are a business that goes back and forth between Bitcoin and fiat.
I think there are many reason why all people in this world including US using bitcoin but the most reason is they want to earn more money and with this technology that support bitcoin here, it will make bitcoin easy to use and easy to earn. Altough you are not used it for business I guess you still can earn it through trading so its like a great solution to earn more