Lots of practice, learning, and failure. This guy got a great combination of product/market fit, timing, and exposure. Finding product/market fit is a skill trainable like anything else (although an incredibly difficult skill to master), timing is just that (plenty of luck involved - but easier with product/market fit). Finally: exposure is easy with the first two - if you have solved a hot problem really well, of course everyone will pick up on that and make it viral.

Start with practicing finding product market fit and getting better at timing things. If you can do those, the rest (exposure, wealth, connections, etc) fall into place. It’s that simple, but it definitely isn’t easy at all