Well, it's all a gamble. The great depression was world-wide, but who's to say that the US alone couldn't have a major setback. And, with the number of multi-national corporations based here, would that affect investments?
Could we have deflation from falling housing prices and then inflation from a falling dollar?
Are we so dependant on imported goods now that we can't even move to a protectionist position now?
Is China able to hold us hostage with the $1.5 trillion in dollar reserves? If they decided that dollars were a bad hedge, or if they wanted to cause some sort of backlash, would they dump the dollars on the market or slowly switch to something like euros?
With the Saudi's sitting on $800 billion in dollar reserves, how at risk are we for oil being repriced in euros across the board by OPEC?
Let's say everyone dumps currency, are we at risk for hyperinflation? If we enter a period of hyperinflation, is gold still an effective hedge?
Is it possible that the future could be much worse than the future? Is it conceivable that the US would switch to barter or even the euro as a means of commerce?
Personally, I'm not smart enough to know if I'm even thinking of the right things much less able to know what the outcome would be. So, I take the last depression into account, understand that we came out of it, and just stay the course I'm on.