There could be fundamental market forces governing the price valuation of assets you mentioned.
Luxury clothes (and items) could be limited edition, deflationary collectibles, priced high off brand name recognition.
Diamonds are valued from scarcity and real world application used in diamond drills and other items.
Gold likewise scarcity and real world application in electronics and other markets.
Bitcoin's value could derive from it being one of few easily accessible inflation protected assets. In addition to its deflationary design and other aspects of implementation. Money is a problem solving mechanism relating to token of exchange. Arguably Satoshi Nakamoto designed and built a "better mousetrap" with bitcoin, in contrast to previous electronic payment networks, savings assets and other relevant aspects of money.
That brand recognition costs a lot of money as well, that is where the value comes from. Creating a brand like lacoste costs so much money, I can make ANY type of clothing for nearly free here where I live, it would cost me incredibly cheap and I mean like literally same quality, it would cost me like $7-12 to make a lacoste shirt and in most cases it is sold for 50 bucks at least, some even more for "limited" stuff. So why don't we?
Because, it is incredibly hard to build a brand like that and that is why we see only like 10-15 brands that big in clothing. Other stuff basically have the same type of reasoning as well, it is just takes time and money and effort to get there. Diamonds are barely valuable whereas they made it valuable by marketing it so much.