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Hi there
(lemm.ee)
Not wanting to get in an argument about 9/11 either, but I can tell you a couple of differences between bank ledgers and blockchains. Blockchains are distributed across many machines and all are synchronised. I had the Bitcoin blockchain on my computer for a while, until I realised how much space it was taking. Anyone can view the contents of the entire blockchain, ask the bank to view all their ledgers and you'll see the difference. Blockchain means an end to most money laundering and corruption. All coins can be traced.
The software behind Bitcoin is open source, so no backdoors can be put in there (at least not without it being noticed, probably), many wallets are also open source. Things like mtgox happened because people weren't using wallets to keep their own coins in, and left it for someone else to look after.
The Euro is a great thing for most people. Greece has financial problems that need long term solutions. If they had the drachma, they would just print more, and devalue the currency, which would make all imports more expensive and prices go up. The Euro prevents this and they have to find another solution. That's more the problem with fiat, that governments will use an easy solution, that hurts people. A currency which is not controlled by the government prevents this and can lead to better solutions that don't make life difficult for most people.
This is just what I know, some facts may be wrong, let's talk.
And later went to the dentist at 2:30