Jim Cramer, TheStreet’s portfolio manager for Action Alerts PLUS and host of CNBC’s ‘Mad Money’ said Fitbit’s(FIT) earnings report was the best beat of 2015 and he’s a believer in the company. The company has filed an offering to sell shares, so Cramer sees Fitbit heading lower. When it does, that’s the opportunity to buy, according to Cramer. The comments were made as Cramer answered viewers’ questions from social media on the floor of the New York Stock Exchange Tuesday. One viewer asked whether to buy FireEye (FEYE) ahead of its earnings report. Cramer noted FireEye’s stock advanced on Monday, so investors should be careful because he believes the entire sector is trending lower. Another viewer asked if LinkedIn (LNKD) can get back up to $300 after reporting an excellent quarter. Cramer compared the company to Facebook (FB) and Google (GOOG), and applauded its subscription growth. He added that he wouldn’t be shocked if the stock continues to work his way higher. Send your questions to Jim Cramer on Facebook or on Twitter @JimCramer using hashtag CramerQ.