The argument for being an accredited investor is that mammas and pappas are too easily duped by con artists when they invest, whereas high net-worth individuals have more knowledge and won't be duped, and thus the accredited investor policy will lower crime. (I am more cynical about the reasoning myself)
It's the wild west. You can do what you want. But there are big questions marks on everything. It's probably too early for something like this... try and keep everything in the bitcoin ecosystem without converting, save the headaches.
It's time for BTC loans though. And actually it's to keep the service from being associated with fraud, not for the safety of customers. A seller is Paypal customer too and they get treated like crap.