Shares of digital pinboard site Pinterest (PINS -0.60%) experienced a resurgence in the past few months. The stock hit a 52-week high of $41.60 in February. That's a dramatic turnaround from the 52-week low of$20.60 reached last May. The company's growth in both monthly active users (MAUs) and revenue last year helped to drive the stock price reversal. Since then, shares have retreated from its February high. But does this signal a buy opportunity? To make a decision whether to snatch up Pinterest stock, i ...