The health-focused fast-casual chain has seen its shares take a beating in 2025.Sweetgreen (SG -1.59%) hasn't been in the public markets for long. But it has certainly taken investors on a roller-coaster ride, tanking and soaring in a seemingly never-ending cycle. Shares are down 74% in 2025, as the market is clearly losing confidence in the business.Investors might view the fast-casual chain as a ripe opportunity on the dip. Should you buy this under-the-radar restaurant stock right now? Skip this mealChi ...