POW:
For Network big like Bitcoin, 51 % attack cost is too high but for some new coin where network is not so big (or do not have many miners)
51% attack can be successfully executed.
It make coin fully decentralized and anybody is free to mine.
For Network big like Bitcoin, 51 % attack cost is too high but for some new coin where network is not so big (or do not have many miners)
51% attack can be successfully executed.
It make coin fully decentralized and anybody is free to mine.
An 51% attack is completely independent from the consensus algorithm (PoS/PoW).
Decentralization also does not depend on PoS vs. PoW. Depending on the implementation of the PoS algorithm, mostly anyone can mine.
POS: It is cheap method and no specialized hardware is required.
It is not cheap, since you have to lock away a big amount of money. It is like receiving interest.
POS:
One who has large stash of the coin will get big share, making rich more richer.
One who has large stash of the coin will get big share, making rich more richer.
The same applies to PoW:
One who has large stash of money will get a lot of asics (and therefore more hashrate), making rich more richer.
POS:
If coin holders want to keep somebody out of network they are able to do so by not distributing there coins outside their network.
If coin holders want to keep somebody out of network they are able to do so by not distributing there coins outside their network.
