Hybrid PoW/PoS for Monero would help fighting the fractional reserve practice from shady exchanges. Either they will offer XMR staking and won’t be able to fake it as rewards will accrue over time and would become a liability for exchanges that aren’t actually staking XMR or a large share of their users will move their XMR to a service that offers staking rewards (or they will do it themselves) which would put pressure on their real reserves.

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[–] g2devi@feddit.nl 2 points 3 months ago

As explained many times PoS XMR is the surest way to permanently centralized Monero because of the Cantillon Effect and slashing. That being said, PoS time or effort (see Torrents) can work. Essentially, the more you devote your machine to validate, the cheaper your transaction fees are. That wallets would then be encouraged to add an "validate in the background" feature. There would be no slashing...you either validated and got the discount coupon on the next transaction or you did not. AFAIK, nodes are validated each time someone syncs the block chain. There is a lot of work being done that's just thrown away because it's not recorded. If that work were recorded, you could have a hundred validations in 2 minutes and finalize blocks far quicker.