Don't you know that you must be motivated by ANYTHING except money? For some reason, money is the only thing that people
say that you're not supposed to be motivated by. (being sarcastic)
Yes, you can be motivated solely by money. This is not to say that you can't be motivated by other things, too.
As a matter of fact, besides the elite in a society, most people are motivated solely by money. Example: You live in some crappy little town in the midwest. You have a high school diploma and that's it. There's only one decent employer within 200 miles that has decent jobs and wages. Somehow, you find yourself as a general manager and make $120,000 per year. You have a family with 5 children, in a 5 bedroom home with 5 acres, and you can't move because your wife's parents live nearby and have Alzheimers, so wife needs to stay in that town. You hate your job, can't stand it. But you stay there, at that job, because of the money. And, what are you going to do, move to the Bay Area and pay the $500K you sold your house for and buy a 1 bedroom condo that all 7 family members and the parents are going to live in?
And that's people who are doing well in a situation like that. There's all kinds of people working at McDonalds and Walmart solely for the money. Probably most of the USA.
Being happy in your job and motivated by it and fulfilled by it: first world problems of the elite in the first world.
So, yes, it is ok to be motivated only by money.
And I tell you what. If you work in a business that is fulfilling and you make $25K per year, but start selling cookware, which is, eh, average in your opinion, but start making $10 million per year, somehow, most people are going to start liking cookware a lot more and really get into it. For some mysterious reason.
And remember, you never want to be the CEO of a company. No you do not. You might have to start off that way, but eventually you should always hire a CEO or general manager if it is a smaller company. You want to be the Chair of the Board. Like Warren Buffet. He's not at Geico every day answering the phones or doing the actuarial tables. He just owns the stocks. I know a LOT of business owners that only come in for an hour or two each week, and let their GM do the grind.