This action sets a precedent for U.S. citizens selling securities denominated in bitcoins for investment in bitcoin companies. If U.S. citizens want to do this they have to register and go through the process as if they are selling dollar denominated securities. They can no longer use the excuse of "legal grey area" when it comes to floating shares for bitcoins. Plausible deniability is over.
If your company is small and unknown it won't matter much but if you get successful and well known you will pay the price if you don't follow the regulations.