That's a tough question. I think that everyone who has a huge budget can create a big tech company, but this is not the hard part. It is more difficult to improve and develop the products and the services of that company than just create it. Every Founder or Chief Executive Officer needs to know about Marketing, Economics and Sales especially at the beginning when there will be no staff.
Personally, I know only about Human Resources, Internal Affairs, Human Resources Development and Training and some stuff about Economics. Nothing special. That's why, I don't believe that I would ever create a successful company like Facebook or Apple all alone.
Don't forget that Apple was created by a team of people who used to enjoy what they were doing. So, what's the tip? Do what you enjoy doing and you will be successful!