Bitcoin solves this. The 1 BTC you have today will always be 1 BTC which will always be the same portion of supply. How much that BTC buys you will change over time, but the portion of supply will always remain the same. And if the last 15 years are any indication, it will generally buy you more over time. Meanwhile, your fiat currency increases supply by 2-3% per year in "good" years.
BTC has kept to its fiscal promise or a fixed supply and reliable transactions for 15 years. Bitcoin has a market cap of 850 billion dollars, which places it in the top 25 countries by GDP. Bigger than Sweden or Israel. It is decentralized and not run by any country but by a protocol enforced by tens of thousands of computers all over the globe. With Lightning, you can send an international transaction in under a second for under a penny in fees. You can do that with a smartphone and halfway reliable internet access. It works in warzones, it works in international waters (with satellite internet), it works everywhere. It doesn't care what your credit score is or whether or not your authoritarian government likes Bitcoin or not. No middlemen, no bank holidays, and it does this for < 1% of global electricity usage, mostly from renewables and "stranded supply".