Does that mean that at some point in the future, bitcoin's volatilities could decrease?
It is decreasing, not only regarding the absolute amplitude between ATHs and ATLs (bull market tops and bear market bottoms) but also regarding the average day-to-day volatility.
You can see more details in this thread:
We're experiencing the least volatile bear market ever.
I'm not saying it will become completely stable, but is there a possibility of gold-like types of volatilities?
Here's an updated chart of 30-day and 60-day average daily volatility for Bitcoin:

Source:
https://bitbo.io/volatility/They used to provide also the volatility indicator for gold. Unfortunately, they ceased to do so, and I didn't find an alternative source for exactly the same indicator (there are many).
Historically however I have noticed that the volatility for the Brazilian Real (
BRL, which is provided in the chart as the
orange line) was similar to gold's , with values between 0.5 and 1%.
Bitcoin is the
yellow line and currently at
1.26%. We can say that Bitcoin has, currently, approximately two times the day-to-day volatility in comparison to gold's historic values, because it often increases up into the 2% range.
In general, I think in the next early bull cycle I'd expect volatility values as low as gold, if no Black Swan (negative or positive) happens. At least if you draw a straight line alongside the current volatility average, it would cross the 1% line in a few years. See this older image where you still can see the
gold value (
yellow, although it only was updated until early 2024 (so the 0.00 value you see for 2026 isn't correct --
Bitcoin is
light orange in this chart, and the volatility trend is the blue line):

(You can also see in this chart there that the BRL -- red line here -- has indeed similar values than gold, see above.)