It was only a few months ago that Linsanity was sweeping the nation. Now New York is buzzing about whether Jeremy Lin, unexpected star of the past season, is worth keeping around. The Houston Rockets have offered $25.1 million for the 23-year-old point guard, and the Knicks have until Tuesday night to match that offer or lose him to Texas. The tough decision has sparked a debate across the city over whether New York should hold onto its one-time boy wonder or let him go. While the undrafted, Asian-American Harvard grad’s overnight success made for great entertainment, some wary Knicks fans are unsure whether it’s worth spending $25 million on a rookie with a winning streak.