Billionaire Jeff Bezos advises people to be careful with their money this holiday seasonBezos is worth $120 billionIn context: We're just over one week away from Black Friday and Cyber Monday, which means retailers are getting ready to start (or have already started) their discount sales.Amazon sees billions of dollars worth of purchases over this period, so it's somewhat surprising to hear the company's founder and Chief Executive, Jeff Bezos, advising people to be frugal.In an interview with CNN this week (via The Telegraph), Bezos was asked if he thought consumers should "batten down the hatches" in response to the global economic downturn.With the sales events and holidays, the fourth quarter is Amazon's biggest, but the company has lowered expectations for Q4 to between $140 billion and $148 billion—much less than analysts expected $155 billion—representing growth of around 2 to 8%.The flip side to the argument, of course, is that if you're determined to buy a new TV, graphics card, laptop, or whatever, purchasing it at a discount during the sales makes more sense than spending more at a later date."