If you love ordering salads from Sweetgreen (SG +1.39%) and see that its share price is just $10.10, you might start thinking about investing in it. I'd caution you to think twice, though, for multiple reasons. Here's why I am not planning to invest in it, despite enjoying its Harvest Bowls. My main reason is this: The company is struggling. It did post a 3.8% increase in revenue in its second quarter, to $197 million, but sales at locations that have been open more than a year dropped by 6.2%. It posted an ...