Most people believe there is no better motivator than money so an unknown millionaire has started a rather unusual social experiment. The generous stranger keeps hiding cash around San Frincisco and then gives hints via a Twitter account called Hidden Cash.
Once the money has been hidden, the Hidden Cash followers receive alerts such as a riddled tweet or a vague photo as hints where to look. If you think fast and manage to solve the riddle before the other 42 thousand followers and get there first as well, you will win the cash but the competition is huge.
There are several theories about the secret cash-giver’s identity. Some suppose he or she is a real estate magnate who wants to donate money to strangers for an unknown reason. Others assume the donor is a very wealthy person conducting a sort of social experiment the purpose of which is yet to be revealed.