Isn't it reasonable to assume that the value of every company will eventually go to zero? In that case - and for simplicity assuming that a share is just a shar

Isn't it reasonable to assume that the value of every company will eventually go to zero? In that case - and for simplicity assuming that a share is just a share of the company assets, no dividends, no voting rights, no whatever - wouldn't the shares just transfer money from later shareholders to earlier shareholders until the share reaches it maximum value and starts its decline towards zero after which everyone just loses money? That seems zero sum to me, from the perspective of all the shareholders, the company can of course provide value to its customers and employees. Things would change if you could exchange your shares for the corresponding company assets. In case it's not obvious, I have no clue about financial markets.