Not everyone lives in Mew York or California. Believe me, if I have 3 million dollars then I will never run out of money, not possible, even with inflation. USD inflation is reality, but my nation has worse inflation than USD inflation, so I will be doing fine without much trouble, wouldn't need a dime more.
But if you are worried about spending, then just get 9 houses where I live, that's right I can buy 9 houses with 3 million dollars, probably more but I don't want to get worse houses, or I could get 30 too, but wouldn't be good houses, so 9 houses is enough. With that, I could make at least 9k dollars a month, or I could even make 15-20 range if I can find houses where I want to, and with around 10k dollars a month, I will be able to live greatly.
If inflation rises, the price of rent rises and I make more too. That is a method people use all the time, I don't need to, 3 million would never run out, but if that's what you fear, then this could be done to protect against inflation.
Ah, yes. If you live in a developing country, $3m (USD) would be more than enough to live like a "King". You don't have to worry about inflation for a very long time. Assuming your country's native currency has a higher inflation rate than the USD. The thing is, not everyone is willing to save and invest money these days. Most people are poor and can't spare what they don't have. With a deteriorating global economy, it becomes harder (if not impossible) to achieve financial independence. The rich are getting richer, while the poor, poorer. That's how the system works.
Bitcoin promises to fix this. It will take quite some time before BTC makes any difference on the mainstream economy. Countries are gradually accepting it, so it should only be a matter of time before "hyperbitcoinization" becomes a reality. I'm pretty sure CBDCs will take over the world after the crisis comes to an end. It's all part of the plan towards a "global reset". Just keep "hodling" BTC and forget about the rest.