Financialization of the economy What is the financialization process of wealth in the economy? What
  are the determining factors? What are its consequences?
  
  What is the role of financialization in the economic crisis of 2008?


I do not know if my ideas are right, but

Financialization of the economy would not be the process of selling debt in the form of financial securities?

The relationship between financialization and the 2008 crisis would be the fact of the credit facility and the sale of debts caused an imbalance in the economy.
Financialization is just a broad term for when financial markets become bigger and have more influence on the market economy.

I'd say that it wasn't so much markets becoming bigger that directly caused the 2008 crisis, but more that the shadow banking financial market became bigger (intermediaries not subject to the same regulation as normal banks). Financialization arguably caused the need for more niche ways of getting money into the market in this way, and as financial markets got bigger, particualrly in regards to housing, more banks ended up securitizing subprime mortgages, and that was a big factor in causing the 2008 recession.