the SEC does not even consider what currency is used, read the Securities act of 1933. It doesn't need to consider or not consider the merit of bitcoin, it considers the offer and sale of securities. This has nothing to do with acceptance or recognition of bitcoin by the federal government.
There are, ahem, some people who claim they aren't dealing in securities. Or real money.
I've already brought this up with some of the US companies listed on the exchanges, its the US COMPANIES AND PERSONS issuing securities IN THE UNITED STATES that have a problem. Some literally have their address listed on the forums and the about pages of the exchanges. They can get their assets frozen any day. THOSE are the ones that need to register with the SEC or file for an exemption. Sitting idle is bad. The only saving grace is that the numbers are too small and hopefully the SEC will turn a blind out.
Questions since you've researched this.
The SEC's rules are there to protect US investors. If a company is registered outside of the US and the securities are traded on foreign exchanges, what can they do?
What would happen if the people behind the foreign company were in the US? What would make the SEC come looking?
What would they do if that company was actively soliciting investments from the public in the US?
For the investors, the only thing you need to worry about is your shares going to zero once the SEC freezes and seizes all the assets one day.
Only thing! I wouldn't touch a US registered investment now.