American Decadence

It seems to me that we are starting to see a few signs that America may be heading for a decline. The middle class is struggling to hang on to that title and they are in dept up to their ears doing it. The bulging real estate bubble, tethered by the hope that perpetual mortgages and the prospect of capital gains will keep it afloat, looms above us all like a giant Zeppelin. I am by no means trying to sound apocalyptic, however the future of our decadent lifestyle here in America is looking rather bleak. While I was in London a few months ago they seemed to be undergoing some sort of boom. There were people with loads of money all around and gentrification was on the move. This is in sharp contrast to how London was when I was there in 1992. I asked around and the consensus seemed to be that on average most Londoners are between 25,000 and 30,000 pounds in debt on their credit cards. It seems the bubble is expanding.
Rapid change has a large effect on any biological system no matter how large or small. So "REPENT, FOR THE END IS NIGH".
Any thoughts?