Germany is getting an export bonanza through a currency that is too weak for that country. It is also facing import costs (including oil and gas) that are higher than they should be. It is tending to overheat - inflation is a risk. The economic case for Germany is mixed. In the end there is a "right" level for a country and a currency either too high or too low is a problem. Germany wouldn't die outside the euro - and it may even be the one economy that escapes most of the costs of leaving.
Germany is facing an increasing political backlash. Most German voters (as voters anywhere) have precious little understanding of economics, but Germany giving big bailouts is a hard one to sell to the electorate. Many alive in Germany remember hyperinflation, and there's a real sense that a safe currency is an absolute demand, and whispers of euro problems are causing political trouble. Politically an end to bailouts and a move onto a new DM would sell.
Germany will be the country that makes the decision - and Germany could pull the rug from beneath the euro at any time. There are both economic and political arguments for doing just this (and indeed for not doing this).
The euro is trending down. Curiously it helps no-one. Greece, the basket case, would need a catastrophic drop in the euro to even register on its problems, basically to get Greece back to a position where it can service its debts. Ireland and Portugal, even Spain and Italy, need drops far bigger than are now happening to actually help them. A decline by a percent or two (or even ten) doesn't really help the periphery but further overheats Germany. A decline of 20-40% (which is what the periphery needs) would overheat Germany and France and others to boiling point.
IMO the bind for the euro is that a fall in value is now too late. Indeed the disadvantages (investors dumping euro-denominated stock, particularly in the periphery) will cause more problems for the periphery. I don't see that any currency valuation answer works now - presumably the best option would be to keep the euro steady. It seems that as of yesterday the ECB has persuaded speculators that there is money to be made for a few more months, but it solves nothing - and the pundits managed to give both the good news and the bad news.