This very much ties into my answer elsewhere on this thread but I hadn't quite thought of it in your way. It's like what the Citibank CEO said about the subpri

This very much ties into my answer elsewhere on this thread but I hadn't quite thought of it in your way. It's like what the Citibank CEO said about the subprime mortgage boom: as long as the music is playing, you've got to get up and dance. VCs are pressured by unicorn successes to 100x their investors' money, and the scarcity of decent (acceptablely small return without absurd risk or absurdly small return with acceptable risk) investments around the world are very hard to come by these days, so Silicon Valley is pretty much the only option left for people with money who want to see more of it.