We will not know what bitcoin will be like in the future, which is certain that he is and also does not need to be worried at all because bitcoin is believed to always increase in price in each cycle it is a very strong belief in our hearts, especially miners, bitcoin will always increase along with fiat money that continues to be printed by the government.
We can not know about future, never but we can predict something in future based on what we know about Bitcoin. Its algorithm Proof of Work, decentralized network from miners to Bitcoin nodes, and its magic design to give Bitcoin holders complete control of their bitcoins through Bitcoin Private Keys.
Another fact we know is it's harder for governments to shut down Bitcoin network than altcoins with centralized power of founders.
Another fact we know about it, is its 21M bitcoins max cap and inflation rate of Bitcoin decreases with time. It's big attractive specification of Bitcoin while we know all fiat currencies are inflationary and their inflation rates increase with time, while their purchasing powers drop with time.
Will not move to PoS it is too much risk and may experience a crash if done like that, I think he is still new and does not know Bitcoin has an amount that cannot be added anymore.
From a better algorithm PoW, to a bad algorithm PoS, no true Bitcoiners want this algorithm change.