That won't be happening anytime soon. He appears to be pretty damn smart with is money. Heres a clip from one of his interviews.
"You told me the last time I spoke to you that you were very careful with your money. What are your plans to make money after your fight career?
Gegard Mousasi: I am in the real estate business. I never spend my fight money. I invest it in real estate and rent out apartments and houses and buildings. I use the income from that to live on and my fight money goes directly back into getting more real estate. Right now I have 11 different properties. I don't want to work after I retire from fighting, and I already will be able to live a very comfortable lifestyle when that time comes."