it's really hard to be this ignorant, like, you probably have to had it taught wrong to you in the first place and have really bad observational skills plus not live outside much. Even then, i doubt most people would get to 15 without realising.

The very simplified logic is this:

As long as Canada allows taxes to be paid with canadian dollars, the currency will hold value. As long as the government is making so much money out of taxes, they have no incentive to fuck up their own currency for short term gains.

Not having to have reserves to cover your currency is cheaper and allows you more freedom to do stuff to save the country from recessions or to drive growth among other stuff.

Canada is trustworthy enought that people value their currency even if they don't have gold. Most countries, specially ones with good monetary policies have even close to enough bonds, international currencies or metals to back their whole currency. But it doesn't matter, as long as everyone knows it's much better for Canada that their currency continues to operate, nobody will believe they will rug pull all the people holding Canadian dollars.