My puny brain can't comprehend the size of the debt nor whether it will be a major issue in my remaining life time. I think I worry more about the stuff "off the books" (the so-called unfunded, and dare I suggest underfunded "mandates.) You all know what they are. I think I read several years ago they added to something like $80 Tril. but it might have been more. If that was true then, I'm sure it's much more now.
In any case, the seeds of our own (money system) destruction were sown as soon as we officially went to fiat currency. It works until it doesn't. So many questions: How will it end (bang or whimper)? When will it end (our life times, kids life times, grandkids life times)? What will replace it (gold or other PM, different (new) fiat currency, someone else's fiat currency - heh, heh, there are no "backed" currencies that I'm aware of though NOT, NOT, NOT an expert.)? Will there be chaos, soft landing, hyper inflation, civil war, world war, intergalactic war (Wait! Scratch that!)?
As one of our resident glass half-empty posters, I'm leaning toward "bad" results and probably sooner than later, but, as always, YMMV.