According to various rumors, Bitcoin is closely following Ethereum's results.
What rumors? ETH hasn't moved to PoS yet. Proof of stake has not been proven to be more secure or decentralized than PoW, so there is no reason for Bitcoin to switch.
Yeah, that's what I thought! I remember that Ethereum was supposed to switch to PoS, but they've been postponing the decision. I was surprised to hear from the op that it happened, and from what I've seen it hasn't happened yet. As for bitcoin, I don't think it's likely that the consensus would ever be reached to make it PoS. Mining has centralisation issues, but it's not like PoS will make it better. And I don't see how miners would be convinced to lose everything they have.