If Bitcoin ETF will be approved, this will be a huge step ahead for btc's future. Not only the price will get more stable, but many new investors might come on market and adoption rate could increase significantly.
If you're taking about US SEC's approval for a bitcoin ETF then yeah probably it will really have a positive effect but I won't say it will be stable, we still don't know how will the market will react except that everyone is saying that the price could go on another level. So all eyes on US right now as expectations are very high for a approval.
I would not doubt it's chance to get approved, I'm sure it's gonna happen soon.
People is not hyping it and it seem they have forgotten it as they failed their expectation many times in the past.
Crypto is a place of high risk investors and the market is very unpredictable, when we least expect it, it will come, so for now we need to wait and see.