This is The TechCrunch Exchange, a newsletter that goes out on Saturdays, based on the column of the same name. You can sign up for the email here. I had a neat look into the world of mental health startup fundraising planned for this week, but after being slow-motion carpet-bombed by S-1s, that is now shoved off to Monday and we have to pause and talk about COVID-19. The pandemic has been the most animating force for startups and venture capital in 2020, discounting the slow movement of global business into the…