The goal is to eventually turn it around:

Put your net-income (after bill autopay) all into Bitcoin and spend it using Lightning or similar. But don't spend all of it, so that you roll over a growing amount from month to month. I'm increasingly doing this and now I'm stacking twice as fast, as before.

Once you do this, you realize that you were de facto "fiat hodling", as you were keeping some as spending money. Once Bitcoin becomes spending money, you can move everything over and your savings will also grow faster because you won't have to deal with inflation on your spending money.

Just leave the shittier money behind. Why keep hodling Reichsmark? Just dump it all into Franc and live off the Franc standard and demand Franc as payment.