Do you think it's possible that the Bitcoin price will follow Ethereum price in the future? When Ethereum becomes proof of stake and becomes deflationary, can it happen?
That won't happen, altcoins always follow Bitcoin trend no matter how good that altcoins is simply because Bitcoin is the king and we always have to respect Bitcoin. We might see BTC pause on its trend for a while since it gives time for Altcoins to follows the Bitcoin trend but after that altcoin season, we always go back to Bitcoin and continue the trend until we reach the moon.