I think it all comes down to how much profit people have as well. Like lets say you bought bitcoin at 10 dollars and bought thousands of it, then bitcoin is now over 11 thousand dollars, you are bound to play some games here, I mean after all you just made millions of dollars in profit, what harm could couple thousand on roll could do to you?
Well, that is true in small cases as well, like you put 1.4k dollars into bitcoin and it turned to be 3.3k after bitcoin went up, well you may play 300 of it back and just take out the 3k, that is how people tend to start gambling around in crypto, that is how I got into it as well. Bitcoin seems to be holding very well so I am assuming it will once again go up eventually and we will see a spike of wagered numbers in primedice easily.
As I can see here usually for some limited bitcoin each person has, they will convert everything into dollars or any currency that exist but for some big player, I dont think that they even count on how much dollars they have. They play with bitcoin so they must get bitcoin as well. For example I have 10 btc and I want to get 10% of it which is 1 btc. It does not matter if the price is surge or not, the result is 1 btc in the end
I think its the other way around. People base everything in terms of the value in fiat.
If Bitcoin was 10 cents each, would you want to gamble and your end goal was to make 10% of a Bitcoin which is only 1 penny? Probably not.
You would probably gamble much larger amounts of BTC because its worth much less than it is today.
Most people that gamble do it with the fiat value in mind. As the price of BTC increase they gamble less and less in terms of BTC but probably the same amount in fiat terms. This is why a few years back you had whales which took double digit BTC bets because it was only in the few thousands and right now very rarely are there any bets which are over > 1 BTC.