Investors have flocked to Tesla Motors (NASDAQ:TSLA) after it reported its first-ever profit during Q1 of 2013. But whether or not the Tesla Model S sedan is a great car -- and the car mags and even Consumer Reports have written glowing reviews on the luxury electric vehicle -- putting close to a hundred grand into the car may be a better investment than buying the company's stock. At least in the near future. contributor Dan Radovsky explains why looking just at Tesla's first-quarter earnings is certainly no guarantee of future profit.