Wanna make a quick million? Here's how:
Greece is going to be VERY Euro hungry for the next 3 months. Fly to Athens with a big bag of cash. All Greek people having relatives in foreign lands (with bank accounts) can send you bitcoin. You pay their relatives in Euros. This remittance operation would be insanely busy in about 5 days. You'd need a courier and body guard each day flying in with new cash.
Instant millionaire.
there is a lot of plot holes in your theory.
first off, you can not fly with a bag full of cash out of the country. as far as i know, airport security all over the world will bust you if you have more that an specific amount of cash with you, and want to exit the country with it.
then there is the security issue , with a lot of thieves out there bodyguards are not enough, besides you have to pay them a fortune to guard you.