SpaceX did not come from nothing. The science, technology and infrastructure that enabled SpaceX to exist was created by tax payer funded programs. I'm not saying he's not a great guy. I'm just saying he's standing on the shoulders of giants.
The taxes paid by people sending cat pictures funds the infrastructure that enables SpaceX to exist.
When the OP stated something from nothing I think he/she meant tangible 'things' from investment and research(ie. rockets). As opposed to Instagram which is a form of communication and entertainment that will forever exist within a software context.
The taxes paid by people sending cat pictures funds the infrastructure that enables SpaceX to exist.