US Coin Market On Fire - Why Not The Canadian Market?

I have found that silver $0.50 and $1.00 have been going nuts, it sells quick and the harder to find stuff goes for silly prices (45,46,47 dollars). I have largely stopped buying at the moment because prices seem quite high.

Wouldn't bother in the least if the market is on fire or not.
I am a lifetime collector.

I can talk about the US market, based on my conversations with a local coin shop that I have a good relationship with, here was the market:

As a local coin shop:

December 2019 to February 2020 - Stable prices and inventory, there is enough of both supply and demand that there is some negotiation available.
March 2020 - April 2020: All heck break loose, everyone and their mother wants bullion. There is no connection to market prices and demand. No one is selling at market. They sell every type of bullion possible.
May 2020 - June 2020: Everything is closed, they are only open to known customers. Sales and everything is slow.
July 2020- September 2020: Little buying but everyone is selling, a large group of collectors die from Covid due to underlying medical issues (like diabetes, old age, obesity). They have to reduce the offers as too much is coming in.
October 2020-Decemeber 2020: Sales start to pick up. People are buying slabbed coins and currency. ASE and AGE are hot and they can't keep them in stock. There are still some sales but not as much as before.
January 2021 - May 2021: All heck breaks loose. People are buying everything except constitutional silver that isn't selling. All slabbed coins are selling so fast for 2-3X market value, the dealer doesn't know what to do.
June 2021 - July 2021: The shelves are pretty bare, so much has been sold and little is coming in. No slabbed gold and common coins are all gone. ASE isn't in stock. Opposite worry, instead of too much stock, you have too little.

As a buyer:

December 2019 to August 2020: I'm not buying bullion, prices and stock are stable.
September 2020 to December 2020: HUH, I got one of these last month at 50% of the price.
January 2021 to July 2021: I'm just hunting for bargains. I gave up on high MS coins, everyone is crazy. Time to start collecting Portuguese currency. I can't find anything locally and when I do I better buy it that day at full retail.

Cause US coins are better!
Just messing with you
It's cause Canadian coins are over graded.
I actually don't know

With the run in silver and to a lesser degree in copper and nickel, I suspect huge amounts of older low grade material have left the system in the last year or two.

An old cent weighs 3.2g. Copper is now over C$5 per pound, which puts the metal value at close to $0.04. I am sure the ARP and others are melting like mad.

Maybe for circulated grades, but that statement is most certainly untrue for higher end mint state coins. Anyone who is a PCGS registry set player knows that trying to cross over grades between ICCS and PCGS is not always a sure thing.

I mostly look at circulated. Mint state is to expensive in most of the stuff I like.