Hi there Steemers!
In my latest video I take a look at the challenges of establishing distributed consensus, explaining the "byzantine generals' problem" and how cryptocurrencies seek to address it through Proof of Work (PoW), Proof of Stake (PoS) and other novel solutions.
At the end of the day there isn't actually a "perfect" solution to the problem yet, and both PoW and PoS have their advantages/disadvantages when compared. It'll be really interesting to see what Ethereum do with their upcoming release of Casper and switching the network to Proof of Stake.
What are your thoughts on Proof of Work vs. Proof of Stake and how things will shake out in the future? Would love to hear from you in the comments. :)