Although recent popular films like 'Fifty Shades of Grey' and 'The SpongeBob Movie: Sponge Out of Water' have lured people back to the multiplex, box office attendance is still on the decline. RealMoney Pro contributor Chris Versace explores this trend, what's driving it and what the stock implications are. Despite slowing cinema traffic, stocks like Regal Entertainment and AMC Entertainment are still near 52-week highs, prompting Versace to recommend that investors book some profits. However, he doesn't rule out all box office plays. With Disney's 'Avengers: Age of Ultron' likely to be a profitable release later this year, Versace explains why that's just one of the reasons investors should consider buying the stock.