Peek your head into /r/ethtrader. You will find people putting their retirement savings, mortgaging houses, etc and these people aren't technically savvy and can be easily taken for a ride. While you might have good apples, there are going to be tons of bad apples, people just coming with a white paper and asking for millions of dollars. Coming back to your question, the rich don't need protection as its ok to lose money when you are rich. The 'not rich' need protection as if they lose all their savings, it will seriously harm their lives.