Bitcoin fell 50% last month. What's safer, a 1-3% predictable devaluation over very long periods of time or the unexpected 50% loss that can come at any moment? In bitcoin's short life, it has a well-established history of losing bigger amounts and more frequently than the dollar's worst years throughout history. Honestly, the argument that bitcoin protects against inflation is laughable because bitcoin has to be more stable than the USD to possibly protect against USD inflation, and it's just simply not. And there's no indication it ever will be.
You are purposely taking the recent crash of bitcoin and taking the best case scenario for fiat and this is not a fair comparison, the US dollar has lost 99% of its value during the last 100 years, I do not have the data but how much value do you think the US dollar lost since the creation of bitcoin? 30%? 40%? And how much value has bitcoin won since then?
It is difficult to know this but since the first bitcoin transaction for a product was the 10k coins paid for two pizzas and assuming each pizza had a value 10 dollars then this means that each bitcoin was worth 0.2 cents and now bitcoin is valued at 33k, a growth of 16,500,00%, now that we have a fairer comparison which one would you like to have and hold for the long term?