[IPO] Didi IPO in 2019

Created by Cato on 2019-03-05; known on 2020-01-01; judged wrong by Cato on 2020-01-02.

• Cato estimated 75% on 2019-03-05
• pranomostro estimated 55% on 2019-03-07
• Cato estimated 43% on 2019-06-13
• Cato estimated 33% on 2019-08-19
• Cato estimated 7% on 2019-10-12
• Cato   judged this prediction wrong on 2020-01-02.