Bitcoin is very different from gold: gold were constantly mined, while bitcoin mining will stop. With the growth of economy there will be growing demand for money, which will cause high interest rates - ie volatility. Bitcoiners believe into that with the memes “number go up” and “∞/21m”. Until the end of mining era the volatility will be severe - and hyperbitcoinisation makes this only worse.

Thus businesses has to outcompete the overall economy growth + premium on top for borrowed bitcoin interest + their own business margin.

No, businesses will not use bitcoin, they will invent their own liquid money w/o this inneded properties. The market Austrians love will decide against bitcoin adoption as money.