One type of business "Shark Tank" investor Kevin O' Leary refuses to support is coffee shops. O' Leary says buying coffee out is a ridiculous waste of money. He told CNBC, "I never buy a frappe-latte-blah-blah-blah-woof-woof-woof for $2.50." O'Leary says he makes his coffee at home, estimating it costs less than 20 cents  per cup.  He invests the rest. O' Leary adds , "The truth is, there is a lot of crap you don't need." His philosophy is money that doesn't get wasted get invested and makes him more money.