Checkout bitmit.
I buy homebaked bread for bitcoin from a guy in my city. You can get books, coffee, motorcycles, land, gold, clothes, computers, phones, snacks, medicine and on and on delivered right to your door. Except the land. But you can buy it and hold it as an investment without going there.
When the dollar fails, the EU economy will collapse because it's dependent on exports to the US. The dollar has been debased for a long time, but its not showing due to demand caused by oil being dollar denominated and its role as reserve world currency. Too big to fail, in other words. When cracks start to show things will move very fast.
While that site is cool, it's far from convenient to have food shipped. I'm not going to order my groceries and wait 3-5 business days to be able to eat.
If the dollar and euro fail, bitcoin will fail because it will have nothing to back it up. 100 BTC is "valuable" because it is worth ~10,000 dollars. If 10,000 dollars were to become virtually worthless, then 100 BTC would be as well, because why would vendors accept something that has no intrinsic value?