[Lon7]

One Way is through Proof of Stake, which Ethereum will likely be moving towards in the future.

https://en.wikipedia.org/wiki/Proof-of-stake

[csomar]

Isn't that equivalent to "centralization"? Instead of "spending energy" for mining; you spend "credibility" or "holding cash".

[Lon7]

Well, it's no closer to centralization than proof of work is. If one, or more than one party working together control >50% of the staked coins you are left with the same result as one party controlling 50% of the hashing power.

[tony101]

I think the assumption is that the more Ethereum you hold, the more incentive you have to keep Ethereum valuable and thus not attack the currency or its transactions.