I mean, that pales in comparison to the power the government has. And our government (in the US at least) is clearly not democratic (DNC rigged their primary to prevent Bernie from winning... we have an election between Trump & Biden and most Americans hate both choices, etc.)
You should be far,far more afraid of that since government spends more than a trillion every year.
Our government isn't authoritarian. It has executive function (and certainly a degree of corruption) but also an obligation to it's citizens. If you spend trillions (or even just millions) of taxpayer dollars without democratic oversight, you'll probably get investigated.
There is the whole "monopoly of violence" concept but that only works because lawmaking is largely a democratic process. It's harder for the government to agree on a 50 billion dollar transaction than it is for private citizens to do the same thing. There's ample reason to fear both, and I wouldn't suggest that individual agency and concentrations of wealth "pales in comparison" to government power (unless you're discussing combined-arms warfare).
