Lol. Your definition of capitalism is worse than useless. For one thing, profit is your revenue minus _all_ of your expenses, not merely what you pay your workers. Material, utilities, rent/mortgage or other interest, training, bookkeeping. overhead, taxes, everything. Different business owners will decide to spend that profit in different ways. Some will use it to expand the business (Amazon, for example), others will pay dividends to shareholders (Google, Microsoft, and most other big companies), others will simply save it for a rainy day (Apple, it would seem). Usually it’s some mix of all of these and others.
Capitalism is simply about ownership. If you can start your own business, then you are a capitalist. If the government prohibits it, then you do not live in a free market. An owner can also be a worker, or else how could a new business get started?
Here’s a practical example: I get my hair cut at Dimaggio’s down the street from me, and the owner cuts hair right alongside his employees every day. He opened that shop decades ago, pays the bills, does the bookkeeping, opens the doors every morning, closes them at night. He is a capitalist, and he is a worker.
Obviously I’ve never looked at his books, but I imagine that he pays himself a salary and that the business has been saving most of what was left over after that, since it’s been a hard year and he hasn’t gone out of business. I think he might own the little building he’s in, and that he rents out the other half of it, but aside from that he hasn’t expanded the business.