In life you have to be rich of something, or nobody want to marry to you, and have build a family with you, you would be foreveralone, and the media would constantly mogging you over and over again for being foreveralone to remain you. And your mum would constantly tell you if you don't get married nobody would take care of you when your aged. Nobody would make a tomb for you, and when you died you would go to afterlife with empty stomach and would suffer straving too in the afterlife. That must be a lot of hurt! ouch!
So back to question. which is preferred? Married to fiat rich or crypto rich? Although crypto can be created at the comfort of your basement, also the value would plummet quickly to near zero too. Do you think in your life, you would ever see someone marry to crypto rich? btw recent news about ftx being rejected to sponsor a superstar due to it is unregistered tell me marry crypto rich might be a distance dream. Also there would be only 21m bitcoin existed, only 21m couples would be able to married rich. When there is billions of population, a lot of couples may not marry rich, due to unequal distribution, some of the crypto super rich would married hundreds of thousand more.
OP's question is quite sensitive in my environment, people here don't marry for money, they hate it, that means they have ulterior motives for marrying someone, marrying a rich person who has a lot of fiat is quite good especially if you come from a country that has strong fiat like USD, EUR or Pound but in the long term marrying someone who has a lot of crypto is much more profitable, especially if that person has bitcoin as an investment asset that he holds completely, in the next few decades its value will definitely increase significantly, while fiat has to face inflation and the like.