The Money Message Challenge is the latest challenge sensation on Instagram. It's when people, mostly celebrities, spell out messages using money. Fat Joe took to his Instagram live to let people know that Busy Bee actually started the trend back in 1983 in the Wild Style film when he spelled out his name in cash. Fat Joe cautioned everyone about flaunting their cash. He said it is a form of self-snitching. These people, when they get caught, they ask themselves 'damn man, how did I get caught? You told on yourself! Nick Cannon and Wiz Khalifa have both issued the same warning about the IRS is watching. What is the most unsafe social media challenge you've seen?