RE:Re re Anyone…You asked about insider ownership / insider buying. You can Google that easily.
Market Value aka Marketcap goes up and down with the shareprice, it has nothing to do with the value of companies assets not is it tied to sales, revenue or anything else.
You can Google the formula to see what drives the marketcap number. You will soon realize that a poor company can have a very high marketcap while a very strong company can have a low one.
It's pretty straightforward but you actually need to make an effort to understand it.