Bitcoin for everyone and so the quantity determines if its for the rich or poor
If Bitcoin is for everyone then it does not matter whether a person buy a portion of it or several number of it. The fact that poor people can buy Bitcoin even in parts, it conveys that Bitcoin can be bought by everyone.
How much quantity can be bought and how long to profit greatly off the quantity at stock, examining this will greatly favours the rich more than the poor, imagine getting $50 worth bitcoin and expect huge outcome, nah, that cant be possible.
This does not mean that Bitcoin is only for the rich. The amount a person can buy is dependent on his capital and we all know that capital is not only define rich people, as long as the person has the money to buy, then he has the capital, and we all know that some exchanges allows people to buyas low as $5 value of bitcoin.
So a rich person using $500k to purchase about 4.7 btc is worth the outcome and gain more faster and bigger in little price increase. So the rich keeps getting richer while the poor struggles with the gain that come with it.
Again this does not mean that Bitcoin is only available to rich people.