It's too far to predict btc position in 2030. But I think there will be many things happen with BTC from now on till 2030. And I think supply will caped if BTC still survives.
I am not sure which supply cap you are talking about as there is a supply cap when it comes to bitcoin, it is possible to predict the growth of bitcoin looking at the ten year market reign of bitcoin and we have seen a lot of changes and many markets and businesses coming up with different solutions and we will see that growth in the coming years, even now it is difficult for new users to enter the market as the obstacles are many to send money to exchanges and with time it will change.