I am from the US and right now the SEC didnt set up any concrete regulations. Most likely these regulations will be set in 2018 that's why all these ICO won't allow US investors because a lot of people are expecting the SEC it ban it like China. Very very interesting times. My biggest question will be what if as a US citizen you buy ALT coins and make couple milion bucks and deposit it on your Bank of America account can the SEC take it away or US government?