I agree with you but my perception is a little bit different. In fact, I got stressed when the price fall a lot and people start screaming it is over, bla bla, crying everywhere...of course it affects me and it increases the stress but at the end there is an inside feeling that my money will be recovered and even increases.
When I play dice with coins or tokens, I usually
forget about their current price, because I personally consider any crypto casino more of an entertainment site than an exchange. I just relax on BetFury and enjoy wagering my BTC and BFG. During promotions, I sometimes place a
relatively large bet. Of course, I am very glad when I win and slightly stressful when I lose, but I
never value crypto currency in fiat money while I gamble in a casino. If I'm in the plus, I withdraw the coin to my
cold wallet.

In fact you just mentioned indirectly the best way to reduce the stress when dealing with cryptocurrencies in general. When we start to consider one Bitcoin as one Bitcoin for example and not as $83 or $100k then it will be helpful for all.
Personally I sometimes look at it that way but most of the time I compare it to FIAT, I cannot deny that.