Well, shares of supercar maker Ferrari screeching to a halt today, down 13%. Investors are worried about some long-term projections by the company. Analysts have been expecting profit growth of about 10% a year.It's now looking like it's going to be more like 6% through 2030. But there are no signs, at least for now, that demand for Ferraris is slowing. The company only makes about 14,000 cars a year and most of those are sold out with waiting lists of more than a year long.Ferrari also teasing some new det ...