The fact that mining is a capital intensive operation has little to do with Bitcoin’s decentralization. Nodes cannot change the supply. When I wake up tomorrow I’m reasonably certain there will still be ~21,000,000 bitcoins, while the central bank will have further inflated the money supply https://upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Co...
But more generally, I don’t see the point. We’ve established that the people who end up with lots of bitcoin are people with lots of fiat money (and some early investors), so all you’re doing here is perpetuating the current economic distribution, and frankly fiat currency and the corresponding banking system is very effective at that already.
You’re right, gold and stocks can also preserve capital against the constant depreciation of fiat currencies. I prefer bitcoin to gold because I can more easily hold my own bitcoin and transfer it globally. I don’t own stocks because I don’t care to tie my savings to the performance of various businesses.