American drivers could soon be partying like it's 1999. Oil prices have already taken a dramatic fall that's saved consumers big time at the pump. Last week, crude tumbled below $42 a barrel, down from $100 last year. One big-name investor is predicting an even sharper drop. "There is no evidence whatsoever to suggest we have bottomed. You could have $15 or $20 oil -- easily," influential money manager David Kotok told CNNMoney. A further decline to $15 a barrel would be huge. Oil hasn't traded that low since early 1999, when gasoline at the pump was selling for under $1 a gallon. Kotok's views on the economy ... (full story)