cartechboy writes: "Tesla seems to be doing quite well these days, but one bond trader thinks the company should quit making electric cars and focus efforts on making batteries instead. Bond manager Jeffrey Gundlach says he's already tried to meet with Elon Musk to persuade him to take the battery-only route. Speaking to Bloomberg, he said Tesla could be 'wildly transformational' in the same way electricity and electromagnets were at the advent of their discovery. Enough people are interested in Tesla's vehicles that Musk probably won't take Gundlach's advice. Should he?"