Succesful business people often have this in common; an almost single-minded dedication to their business. Everything else comes later if at all. They are not overly intelligent and some may even be considered stupid. They know only one thing and that is focus of their lives, the business. Intelligent people are naturally inquisitive and therefore easily distracted from mundane concerns like getting money out of a reluctant debtor. For this reason smart people are ........ b.b.l.
It all depends on what you apply your intelligence to. Quantum physics usually isn't very lucrative. You need something to sell, the motivation to do it, and sometimes some charisma and people skills are required.