If you execute on this plan, you are probably an unlicensed MSB. If you don't know what that means, don't execute on this plan until you do.
"the term “unlicensed money transmitting business” means a money transmitting business which affects interstate or foreign commerce in any manner or degree".
If you keep your trades to people within your state, I don't see how you'd be breaking the law here.
You're also picking at one thread of a regulatory tapestry. Even if you are successful, there are a lot more threads.