You hold nothing If this money not backed by something real or atleast with cash.
The BONDS treasuries not something for sure but they are more like coupons wich show's how good situation the goverment and other people are to keep value of money.
I told my own bank show me stablecoins, cash,or cryptocurrency or gold equlaint with money i have otherwise i own only numbers wich doesn't mean anything just the numbers on screen.
It's mature way to look finances i don't want to my wealth backed by bonds coupons it's speculative and we never know If they keep holding any value at all.
I stay my point: something i can hold in my hand or private wallet that's real wealth and the wealth i can count on.
It seems that you have really understood the real value of money so you are starting to have a little wiser opinion for yourself regarding saving money. Because the value of money can tend to decrease when there is inflation or when there is an increase in the price of goods that is beyond our own expectations. So when you start choosing gold or other crypto like stablecoin, at least it can save your money value for a long time. But you also have to choose the right choice when your choice is on stablecoin whose value is integrated with the USD currency value.