Bitcoin investment does not require too much capital to start up, and for most low income earners they find it more convenient to invest in bitcoin with the little amount of discretionary income available to them. Instead of looking for huge amount of cash to start up an investment, they choose to only make use of the little money they can afford and invest with it in bitcoin, it also gives them the space to be able to buy bitcoin and hodl whenever they are able to get a discretionary income especially since the DCA strategy allows them to do so. So it’s easy to say that most people invest in bitcoin because it doesn’t require them too much stress of looking for a huge amount of money to use and start investing.
This could be one of the reasons people tend to invest into Bitcoin. However, don't forget that Bitcoin isn't the only investment you can start with a small amount of money. Many stock, ETFs, and other investments can also be bought with very little capital, especially now that fractional shares exist.
For me, people select Bitcoin rather than some other assets due to the long term upside. Bitcoin has the potential to deliver much bigger returns than many other assets, and that's the main reason people go for it.
