Social media giant Facebook reported bumper earnings growth on Wednesday, but some analysts have called into question how long the party will last.

Facebook's stock climbed to an all-time high of $71.29 per share after second quarter earnings substantially beat estimates late Wednesday. The firm posted earnings of 42 cents a share, excluding one-time items, on revenue of $2.91 billion, a growth of 61 percent from the same quarter last year, and generating a profit of $791 million, up from $333 million a year ago.