Stock

Well, I think I'm going to invest some money in the stock market into a company I trust, but I have a question first.
How does stock change?
How does stock change?
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they buy in as part of an investment group. that way you have proper interest in the company and are elligable for company profit from the shares. Share owners make money from the company itself not selling there shares. Thats the whole point, you are buying a part of the company and therefore entitled to part of the profits. The more your own the more your entitled to. The idea is you keep the shares as long as possible.If so how do people make millions off of it?
The stock I want to buy is currently $66.45 a share, so say it goes up .12 today, does that mean that for every share I bought I made $ .12 on it?