Many cryptocurrencies do have utility by running small programs or storing data. The coin economy on top incentivizes people to participate. For stock, what ef

Many cryptocurrencies do have utility by running small programs or storing data. The coin economy on top incentivizes people to participate. For stock, what effect do stocks changing hands in the stock market have to the company really? (repeated from here https://news.ycombinator.com/item?id=29823307 https://news.ycombinator.com/item?id=29823307)