Technically, you could use quarters, dimes, nickel, pennies. That is cash that can minted without debt.
I don't think that is true in the present era. Pocket change has had no precious metal content since the 1960s. A quarter is just a steel placeholder for something of value historically, meaning they dealt with the issue of minting change without generating debt by debasing the value-content of the change. It looked the same on the surface but it was "almost free" to manufacture, much like paper notes.
In Canada, where I live, pennies are no longer "cash money" by government edict because copper had become relatively valuable and the government could no longer afford to use copper for placeholders. Every one they minted generated a debt of a few cents so in this case they solved the mint-without-debt challenge by no longer minting it at all. The lowest unit of cash commerce here is now the nickel - inflation watchers can of course imagine where this precedent will lead.
A "nickel" obviously is made of nickel, right? Wrong. For trivia buffs, from Wiki:
"The Canadian five-cent coin, commonly called a nickel, is a coin worth five cents or one-twentieth of a Canadian dollar. It was patterned on the corresponding coin in the neighbouring United States. Starting 4 February 2013, after the elimination of the penny, it became the smallest valued coin in the currency.
The denomination (i.e., the Canadian five-cent piece) had been introduced in 1858 as a small, thin sterling silver coin, that was colloquially known as a "fish scale," not a nickel. The larger base metal version made of nickel, and called a "nickel," was introduced as a Canadian coin in 1922, originally as 99.9% nickel metal. These coins were magnetic, due to the high nickel content. Versions during World War II were minted in copper-zinc, then chrome and nickel-plated steel, and finally returned again to nickel, at the end of the war. A plated steel version was again made 1951–54 during the Korean War. Rising nickel prices eventually caused another switch to cupronickel in 1982 (an alloy similar to the U.S. nickel), but more recently, Canadian nickels are minted in nickel-plated steel, containing a small amount of copper."
DASH relevance? - the old dispute about what "really" has value - mere invisible bits and bytes in anonymous computers dependent on the Net or shiny government-issued dross? Any version can be spun to make it sound good or bad. Choose wisely then dump fiat! ;-)