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.
I think your fears are exaggerated. Marriage cannot be measured by how much money you have, when you want to get married and love each other, that person will be willing to be your partner even though your economic condition is not healthy.
I catch your question leading to money that can give happiness after marriage, fiat rich or crypto rich there is no significant difference, because both of them have wealth in different forms. For me, real wealth is not how much money you have, but how to build a household so that it is always harmonious even if it is not supported by a lot of wealth. Happiness after marriage is something that nothing can buy.