I don't really think people are leaving finance for tech because it's a gold rush. Most of these guys are making half of what they made as an associate or VP. Even with all the money pouring in, exits aren't exactly that common. Even if they were, most of these people aren't going into executive, or technical or founder roles that they could make that much money off the exit.

But you do get to do much more interesting and rewarding work. You get to work in a collaborative and supportive environment You can wear whatever you want and enjoy the SF weather. And the hours are way better.