This will change the mindset of traditional people thus the traditional fiat system will also be impacted by it, people will tend to invest there money in BTC ETFs now, while before approval they don't consider it as a good investment even if they are aware of the good benefits of it.
So there will be more people looking into Bitcoin. Might also divert thier attention into other cryptocurrencies. I see why Bitcoin is currently increasing in trading volume..Hopefully, we won't see any FUD anytime soon.