Withers: It sounds like one of the Intel (NASDAQ: INTC) founders that said only the paranoid survive, [laughs] I can see that description fitting Elon Musk very well. Finding stocks of companies with a strong "moat" -- a defensible position against competitors -- is a necessity when investing for the long term to outpace inflation. But as Tesla (NASDAQ: TSLA) CEO Elon Musk once alluded to, a good offense is sometimes the best strategy given how quickly technology is transforming the world.