I lost $100,000 to a Ponzi scheme that my advisor billed as a safe alternative to bonds and stocks. It was a "private placement," which according to a friend of mine who is a FINRA licensed stock broker is a type of investment for the very wealthy only. I had no income and was trying to open a business when my advisor put me in this program. I have quite a bit of evidence and a witness proving the broker made these claims. Should I save myself the money and represent myself in FINRA arbitration against him or do I need to hire a lawyer?