Lance Armstrong's early investment in Uber has paid off big time.
Armstrong revealed to CNBC that in 2009, he made a $100,000 investment in Chris Sacca's venture capital firm, Lowercase Capital. His investment was then mostly spent on Uber, which at the time had a valuation of $3.7 million.
Today, banks estimate Uber to be worth $120 billion, as its preparing for its first IPO.
Armstrong declined to say how much the investment is worth today, but called it "too good to be true."