As long as you are a human being domiciled in a certain part of the world, there is no way you can absolutely avert your fair share in the economic turbulence of the country. Do you think Bitcoin can totally save you? Then you are joking, Bitcoin like any other asset has the raining and the drought moments, just like any country or their currencies facing their own trying times.
My advice to everyone is to be smart and economical to know the time to own much Bitcoin to hedge against economic troubles and also the time to hold on to a dependable fiat when the drought time comes to Bitcoin.
No economic and investment conditions can be perfect, let's continue to catch the fun as we get more speculative and smart daily rather than being sentimental.
I think that's possible, not easy but "possible." Think about it this way, if you keep investing %10 of your salary into bitcoin for 10+ years, I think you will reach to a retirement profit no matter where you live. Unless that's Venezuela, Zimbabwe or Argentina level of poverty.
Most people living in the west for example could end up getting a good return on their investment and they could retire because bitcoin could go up enough during that period to make you rich. I know that it is not easy, there are very few people who would be able to do it, I am trying my best and even I fail, and that means we will not see plenty of people doing this, but that doesn't mean that it is not possible, I think it is totally possible.
First, investment is possible in any country, and it will even earn more for those troubled countries if the investment is external like Bitcoin. This means more money when they eventually convert it to their local currency.
But you have to know that only God can tell what will exactly happen in the 10+ years you referenced, we can only speculate or assume. And based on my trading experience, experts can only be making regular annual speculations with their analysis, all the rest are assumptions as the longer it is farther, the more difficult it will be to ascertain. Bitcoin is not an exception, you don't know what will happen in the exact year the person would be needing the money.
The fiat is not totally useless as well, for example, in my country, those who had their USD in the past 10 years should be gaining about x6.5 of their money now. Is that not also an investment? Now, my point is that you can utilize fait and Bitcoin at their useful times and dispose of them at their troubled time. For those who bought Bitcoin in November 2021 in USD for a plan to sell in November 2022 will not be happy because they will lose in multiples. While those who sold their Bitcoin and bought it at the same earlier specified time will gain and would have the power to buy multiples of BTC with the same initial capital.
This is wisdom in investment, Bitcoin and fiat can make profits for you when you adjust the time you buy and sell them, not believing you can buy just Bitcoin alone and keep it for too long. What if the unforeseen now happened?