My prediction of Bitcoin without centralized exchanges it would be a market with less volatility and less daily volume, the price would be about the same maybe, I am not sure.
With enough time the lack of convenience and comfort would have gotten solved, though. There is already one project of decentralized exchange for Bitcoin which I have heard of (Bisq), but we all got used to businesses like Binance and Coinbase.
Agree with this, because regardless of anything the exchange will also affect the volatility especially in this case and most likely as you said when it comes to bitcoin without an exchange there even though it will still grow but this will probably be less when compared to the exchange there . because indeed this is not a figment for me maybe even I can be said that I still have more dependence on some of the exchanges that you mentioned.