StockX has reported $400M in revenue for 2020, up from $239M in 2019, but what’s next for the sneaker, streetwear, and collectibles resale platform? — Dan Gilbert, who runs multiple billion-dollar businesses including Quicken Loans & the Cleveland Cavaliers, started to notice something interesting in 2015: “The amount of interest and activity among my boys and their friends about sneakers was just crazy. Then I start asking other people that have teenage boys, and it’s…