The market is inherently unpredictable: if you think an accident is bound to happen, that still doesn't tell you when it will happen. However, this article by Paco Ahlgren takes the long view and maintains that the dollar must one day become worthless.
In the short term, who knows? In times of panic, many investors could run back to holding the dollar and temporarily boost its value.
Other countries are also weakening their currencies. Even the Euro suffers from flaws in the economies of some of its member countries, so although it may seem strong now against the pound and dollar, it too may be overvalued.
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