I legitimately don't understand BlockChains and why Etherium

don't know why Etherium is the hot shit but block chains are peer checked queuing shit for transactions to eliminate coin fuckery

block chains will get btfo if a huge fraction of miners pool and beat the chain vs the rest of the peers (all other users)
but that would destroy the security of it so no collection of people will ever do it unless they want to lose out of possible money from the system collapsing and everyone jumping ship or selling their shit asap

it's pretty secure, but you're (everyone is) throwing away compute power to solve an artificial equation
I think only "Golem" is trying to trade compute for some sort of currency now

Block chains are the transaction history of everyone using the cryptocurrency, when you download the wallet it will download the blockchain

This means that if someone where to edit the block chain (I.e. to give themselves a ton of coins) it would conflict with the block chain everyone else has. Since its decentralized, that means no one person/organization has control over the currency

>>60757252
Ethereum is fixing that 51% thing next year.
It will also end mining.