It made me understand that this is all about protecting the customers investment, and, if nobody is protecting it, then it would have to be the SEC who does it, but they can only do this if it is a security. If it isn't a security which has to be protected by the SEC -- like Coinbase is claiming -- then who is protecting it? This appears to be what the SEC wants to have answered. Coinbase instead wants the SEC to tell them what to do about it, but that they don't want to set it up as a security. Yet Coinbase would be happy with just proceeding without any protections in place.