Protip guys, don't start a business like this without first hiring a lawyer who specializes in finance & securities law, period.
In other words, don't start a business like this without first being a millionaire, or having one to back you up. (it won't stop on "hiring a lawyer")
This is pretty much true. People wrongly perceive the barriers to entry into the Bitcoin financial services market as being low - they pretty much believe that all they need to be successful is an idea and a website.
Technically, the barriers should be as low as that, assuming your idea and website are good enough. But no! Thanks to unaffordable licenses and kilometric, ambiguous and incomprehensible regulations that no human being can possibly follow strictly, yeah, your barriers of entry get really high.