The legendary investor has led Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) in building up its cash stockpile. Rates for Series I bonds are established based on inflation, which is again rearing its ugly head in a major way. Absolutely brilliant Could you potentially make more money over the next 12 months by investing in a stock such as Buffett's own Berkshire Hathaway?