Putting your savings in real estate was all the rage five years ago or so. It didn't work out so well...
As for using it to start a business, most people have neither the time, the skill, nor the inclination to become entrepreneurs. Even among those who do, the majority of startups still fail and go broke. This would seem not to be the sort of thing for most people's retirement nest egg.
Money and securities are liquid, and dollars, at least, are reasonably stable in value (at least compared to the alternatives). You can move in and out of them with much lower transaction overhead than most other assets. That seems a more likely explanation for their popularity than a banking industry conspiracy.
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As for using it to start a business, most people have neither the time, the skill, nor the inclination to become entrepreneurs. Even among those who do, the majority of startups still fail and go broke. This would seem not to be the sort of thing for most people's retirement nest egg.
Money and securities are liquid, and dollars, at least, are reasonably stable in value (at least compared to the alternatives). You can move in and out of them with much lower transaction overhead than most other assets. That seems a more likely explanation for their popularity than a banking industry conspiracy.