This means that as more and more institutional investors are getting into ETFs, it could possibly mean that Bitcoin will become more stable (less volatile).
I agree with this stance but there is at least another big factor, Bitcoin market cap. When Bitcoin market cap gets bigger, its volatility will naturally become smaller than what it was in previous market cycles when Bitcoin had significantly smaller market caps. It's natural with all assets, not only with Bitcoin.
You can not expect gold to have similar high ROI like Bitcoin had in past years because gold has bigger market cap.
https://companiesmarketcap.com/assets-by-market-cap/If that's no longer possible, then Bitcoin might just become a playground for institutional investors.
Stock market is a traditional market with older history than Bitcoin market and it is full of institutional investors. What's happening in stock market nowadays in 2025?
It has both institutional investors and small (retail) investors and if you have small capital, but you are knowledgeable and intelligent enough to follow whales' traces in the market and their set-up games, you can get very good profit, even better than whales.
Small investors have big advantage with small capital, they can more easily enter and exit the market and they can do it very quickly. Whales with big capital have to enter and exit the market during a long time and they do it in long lasting accumulation and distribution phases.
Where does that leave us (small investors)?
As I said above, chance for small investors will still exist and if they can invest with a good strategy, they can get good profit even Bitcoin volatility will shrink more over time.