I think everyone should even have an investment mindset, you must not have it all before you start investing, with the little one have you can start acquiring properties, gold or even buy bitcoins, at the long run you will see the result of your investment.
So investment is not only for the rich or wealthy people , but it’s for everyone even in that rural area you can acquire a land as time and years goes by there will be development, I could remember a man that bought a small land along the road , 10years down the line , government took over to work a major road and the building happened to be along the road , he was paid of , which was x15 of what he bought the land with , that was a life changing for him and his family .
Nice example, but that doesn't happen to everyone, unfortunately. I agree that the prices of land and other real estate properties increase over time, but it also depends on where you've bought the property at, because not everyone gets 15x from the government or a private company to use their land for a project or something like that, and most people have to wait for 5 years to a decade before they get good returns on their investment if the land is at a place that isn't densely populated.
Anyway, about the mindset, I think it's not only about having an investment mindset but it's more about having enough understand about how you should do it and you should have enough managerial sense to be able to manage your investments properly because so many people make investments, but not all of them succeed and get their lives changed because of it, but only a few do, and that's because they understand the markets where they've invested.