Shake Shack's stock has seen a significant 92% YTD gain, indicating strong performance. However, the stock is currently facing resistance at the $120s-$130s range, suggesting limited short-term upside. The company's premium positioning may restrict its expansion potential, particularly in suburban areas, which could impact future growth. The recommendation to hold, with potential buy in the low $100s or high $90s, and sell near $130s, reflects a cautious approach given these factors.