No such thing as "better blockchain consensus protocol" until your so called better blockchain consensus protocol has been through hell and back, namely, attacked by all angles on the technical aspect and attacked by all angles in the social engineering aspect (fork attempts by governments, social media attacks such as the twitter handle taken over by a fork, exchanges against you...) this is what Bitcoin has survived.
So far there is no PoW replacement. PoS has been proven to fail with NXT in the past, it wasn't pretty. We've seen IOTA fail big time as well, so DAG doesn't cut it. Hybrid attempts such as Decred.. no one hasn't even bothered to attack it for real yet.
I don't see realistic reasons for anyone to sell their BTC to get anywhere else.
PoW was also attacked and actually hacked in the early days of Bitcoin.
There's no reason these new consensus algorithms can't become as secure as PoW over time.
So far, the PoS and DPOS algorithm have been operating just fine for years now with no recent hacks. I don't doubt all the blockchains using these consensus algorithms are being attacked at all angles.
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