Guys, thoughts? We need to change Bitcoin to proof-of-work (PoW) to proof-of-stake (PoS), right?
https://www.reddit.com/r/Crypto_ICO_Investing/comments/72btqm/proof_of_work_is_not_secure_has_no_future_and_is/?ref=share&ref_source=link"Bitcoin needs to change to Proof-of-Stake (PoS) if its to survive in the long run. Otherwise, its competing crypto-assets would do the world a favor by burying it.
Why? Firstly, PoW is not secure: As of August, youd need only $400800 million (*1) to attack the $44 billion Bitcoin chain (and in PoW too, you can even get some or even all of the attack-infrastructure investment back by short selling in the right moment).
This makes PoW seem way less secure than PoS, where youd need at least 15% of the stake (*1), or over $6B, and to buy all that, youd drive the price to the moon, while everyone else cashes out, and the attacker is holding a worthless bag. But in PoW, even if the network forks away, the attacker didnt spend money buying any coins, but rather the transferable power to attack any similar forked coin as well.
Secondly, PoW is also a huge pointless electricity drain on the world, already using more electricity than Iceland, the country.
PoW served its purpose. It was good for getting economic incentives for miners to jump aboard.
However, if prices go 1000x higher as we like, itll be 1000 Icelands, or entire continents of power just for PoW (*2).
PoW therefor has no future. Its not at all secure, and itd use entire continents of power usage to power it.
Bitcoin better change to Proof-of-Shares (PoS), if not delegated dPoS, or its hard to imagine how itll survive, by even modest govt attacks or otherwise.
For the time being, only PoS and dPoS systems such as NEO, QTUM, LISK, Bitshare, Steem and others coming to d/PoS like Ethereum, Tezos and EOS, seem like viable."
(*1)
https://bitcointalk.org/index.php?topic=2050869.msg20571959#msg20571959(*2) It's a common misconception that the transactions volume would need to go up 10x for electricity usage to go up 10x. It doesn't. The electricity usage is much more correlated to bitcoin price than usage. If price goes up 10x, then miners are incentivized to invest 10x more on hardware and thereby increase the computational competition and "difficulty" of mining by 10x, and therefor electricity, by 10x.