Not everyone with MBA or MFE makes a lots. It depends on individual. Similarly not everyone with MFE can be a trader. Being a trader you need to be informative and sociable as well - which is more or less mba materials! Being a trader you need to know technical stuff too - so MFE comes along.
Sub-prime is not so much an issue now. Please do not forget there are other problems in this areas:
1. Mortgage- backed securities..still unknown
2. Principal loan caught up with sub-prime ...soon will get exposed
Market will have to shoot down sharply. No one can help.