[IPO] Pinterest IPO in 2019 H1

Created by Cato on 2019-03-05; known on 2019-07-01; judged right by Cato on 2019-05-17.

• Cato estimated 70% on 2019-03-05
• pranomostro estimated 35% on 2019-03-07
• Cato estimated 25% on 2019-03-21
• Cato estimated 80% on 2019-04-09
• Cato   judged this prediction right on 2019-05-17.