Go look at bitcoin, lets just say you had 10000 dollars laying around and you bought btc a week ago. In july 31st it was about 9500. Today it is 12000 as I am typing. No need to wait for the big pay day, just sell and net that 2500 bucks. Thats easy quick money.
Thats pretty good for just looking at the computer screen.
Today I am up 22 bucks, ill wait to see if it starts dropping before I transfer it over.