Proof-Of-Stake cryptos surely have a much easier path when viewing scalability? With stakers not having to worry about electricity costs like miners do, they are incentivised by merely holding the currency in an unlocked wallet.

While I don't think any current POS system is perfect, my favourite so far is PIVX (a code fork of DASH). They have a seesaw profitability algorithm that makes both staking and running a masternode the most profitable way to secure the network at different times. Most interestingly, they burn all transaction fees which in the medium-long run aims to make the coin inflation-neutral.

Great post about one of the biggest issues facing the crypto world today. It feels like we're so close to mass adoption, so I'm hoping the big boys get their act together!