CNN: Where are the users? Why Facebook's stock is imploding. >"Competition from TikTok. A stagnant user base in key markets. A pricey bid to invest in virtual reality that could take years to pay off."

>"Competition from TikTok. A stagnant user base in key markets. A pricey bid to invest in virtual reality that could take years to pay off."

>"Competition from TikTok. A stagnant user base in key markets. A pricey bid to invest in virtual reality that could take years to pay off."