Bitcoin is for everyone, bitcoin is the freedom for everyone on earth to own bitcoin, in other words bitcoin is for those who can take risks, not because they are rich or poor.
Maybe many people think bitcoin is for the rich because they usually always make controversial statements like there is bad news or good news, in other words people usually say rich people can manipulate prices. But what is certain is that rich people cannot control the bitcoin market, every market movement can only be controlled if there is one person who has assets of more than 50% of the total assets available. So the question now is, is there one person in the world who owns half of the total bitcoin supply? There is none.
So bitcoin is not only for everyone but also cannot be controlled by anyone including the rich. Maybe the difference is that rich people can buy more bitcoins, but poor people can only buy small amounts periodically.