Quote:
Originally Posted by onemoretimes
Isn't the whole point of "mining" the fact that it costs money to do thus giving "value" to the coins. If it's essentially free to mine or costs very very little, why should they be worth ****?
This is a myth I believe. The market cap of bitcoin is worth way way more than the electricity used to create the existing coins. The resources dedicated to mining adjust to the value of the coins (and the size of the block reward), not vice-versa. Why should I care how much someone spent on electricity to mine a block?
The point of mining is to make it difficult to make blocks, so that an attacker can't make a blockchain longer than the honest/valid blockchain. It's to secure the network, not to consume energy. The end-goal is to have a decentralized ledger that is secure from double-spends and other attacks, proof of work through hashing is one way of doing this.
Ppcoin uses proof of work and the very same hashing algorithm that bitcoin uses to distribute coins, but the network is secured by consuming coin-age (# of coins * time elapsed since they've been spent) every time a block is created. To 51% attack or double-spend on ppcoins, an attacker would need to (at least in theory since it has not been tested extensively) control a large percent of the ppcoin supply. Just like how to 51% attack bitcoin one would need a large percent of the hashing power. The differences are that coin-age doesn't consume electricity to create (think about how many resources would go to mining if bitcoin reaches its potential) and that an attacker would need to acquire enormous amounts of the very coin he's trying to destroy.