Earlier this week, news broke that payments company Stripe raised an $80 million Series C from Khosla Ventures, Sequoia Capital, and Founders Fund (Disclosure: Founders Fund is an investor in PandoDaily). This brings the startup’s total funding to $120 million, and its valuation to $1.75 billion, more than double what competitor Braintree sold to PayPal for in September. It’s big news, and the media coverage trumpeted the “lofty” funding as proof of Stripe’s “explosion of growth.” Across the board, these stories failed to note the hurdles that Stripe will face even with a trove of investor cash.