Coinbase’s Emilie Choi: $300 Million Raise Was ‘For a Rainy Day’ ByLeigh CuenPRO INVESTOR Updated: 01 November 2018 DisclosureWe sometimes use affiliate links in our content, when clicking on those we might receive a commission – at no extra cost to you. By using this website you agree to our terms and conditions and privacy policy. Coinbase’s $300 million Series E was about a “war chest” for expansion, not necessity, says Emilie Choi, its VP of corporate and business development.