AppLovin has rocketed to a $100 billion valuation. Some industry insiders are skeptical its run can last.

Wall Street has fallen in love with the mobile adtech and gaming company AppLovin.AppLovin's recent push into e-commerce sent its market valuation over the $100 billion milestone.Some ad industry insiders question the sustainability of its run, however.Shares in the mobile ads and gaming company AppLovin have been running wild — and advertising industry insiders have a lot of questions.Advertisement AppLovin entered the Nasdaq 100 in November, with its market value surpassing the $100 billion milestone and ...