He admits that if the right offer comes along, the kind of offer that only three or four companies in the world could come up with, he would have to jump. But what is that? Five billion? Seven? Ten? It’s hard to know, because in Silicon Valley today, money has lost all meaning and value. It is an abstract construct that can be exchanged for homes and Teslas and handmade selvedge denim jeans flown in from Japan, but nobody really has any idea what constitutes “a lot” anymore.