Up about 250% year to date, Tesla Motors(TSLA 4.96%) stock has been soaring. In fact, in the last two months alone, the stock has raced upwards by more than 100%. Does this mean it's time to sell the stock?

Fool contributor Daniel Sparks thinks that, as long as the business is meeting or exceeding your expectations, there's no reason for long-term investors to sell -- whether the stock is overvalued or not. And, as Daniel explains in the video below, Tesla's business is firing on all cylinders.