Would you like to mine bitcoin?
Don't have the computing power?
Check this out:

http://mql5.com/8nj

It uses your CPU for stock exchanges...
No promises of huge profit, I make up to $0.06 a day.
You could make more though if you had a lot of CPUs.
But it's not a scam like the rest. 
No need to ever invest, because you can't. 
Withdraw at any time with Paypal or WebMoney.
It doesn't slow down your computer.

Enjoy!