One of the reasons of this is the inflation: it is a kind of regressive tax, this tax is paid mostly by the poor because they loose their savings, while the wealthy keep their savings not in money but in assets.
Isn't the reason that rich people invest in various assets simply because they have enough money for their daily lives and can afford other ways of investing? 
Give a poor person bitcoins or other assets, and the first thing he will do with them is sell them. And I don't think we need to condemn him for this, because firstly we need to ensure that basic needs are met, and then we need to think about investments. Moreover, Nvidia shares or cryptocurrency cannot be used to pay for utilities, for example.
You are actually just saying it the way it needs to be said. People always put a blame at the poor man for not making investment opportunities but in real time, the poor man cannot really afford to do even what some of us here would regard as the barest minimum. When sometimes we talk about investing in DCA, even when the DCA is designed for the average people who wish to invest in bitcoin, it is still not everyone that can afford to DCA because it still requires some funds to do so. Some people say bitcoin investment is for everyone but I deeply disagree with that because is actually not for everyone but people who could afford the little spare money to invest and not for those who live from hand to mouth.