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 think that in the year 2030, bitcoin will have a good value, because so many years of market phases have passed that the world population would almost know the bitcoin technology and everyone will want to have it, by 2030 it is likely that bitcoin will have much more value than the current 2019, due to the many merchants that operate in the market 24 hours and added to this the bitcoin enthusiasts who enter every day.