Are there any numbers on this? The survivors bias is so so strong, I have no Idea how many fail. But actually I long for even more than numbers: I've seen enou

Are there any numbers on this? The survivors bias is so so strong, I have no Idea how many fail. But actually I long for even more than numbers: I've seen enough phony people where I knew they'd fail after overhearing them for just a minute in a café. I wonder how many of those I'd give a realistic chance make it in the end. Another thing I wonder: Are there many sereal bootstrapped interpreneurs, that have a small business running to finance multiple start-up attempts? (As opposed to starting from zero again, with a new team and all)