"Niklas Nikolajsen, the founder of Swiss crypto broker Bitcoin Suisse, predicts that Bitcoin (BTC) will move to Proof-of-Stake (PoS) once the Ethereum (ETH) network has proved the algorithm’s success."

https://cointelegraph.com/news/bitcoin-will-follow-ethereum-and-move-to-proof-of-stake-says-bitcoin-suisse-founder