If your concept of marriage is purely materialistic, or that someone takes care of you when you reach an age, then this is not marriage, but a replacement of interests, so that you get married for a specific purpose.

Marriage is the presence of another party with whom you can be reassured and thus share your life with him so that he is a motivator for you to produce and be productive and to form a family that is beneficial to society, and then reassurance is the only condition and not the material aspect.

As for being rich in fiat or crypto, the rich is the one who knows how to divide his wealth so that it is not all in one investment, but a variety of investments in gold, dollars, bitcoins, stocks, real estate, etc., and not an investment in one investment wallet.