First some short explanation, and then the questions.
If I bought stocks, bonds or fiat currencies I hold securities by which those who put them on the market, have the liability to me. Stocks are put on the market by companies. Bonds by corporations and governments. Fiat currencies by banking system and borrowers. By putting their securities on the market, the said entities essentially borrowed capital from the market, which is why they have the liability to return it back. This happens when they withdraw securities from the market. So if I am a market participant holding their securities, the capital is returned to me when companies buyback stocks or liquidate the business, when corporations or governments pay me bond's face value, and when the banking system and borrowers sell me the seized collaterals or goods, services or labour to get currency units for liquidating the issued loans.
Bitcoin on the other hand, is not a security. Its issuer/issuers have no liability to withdraw bitcoins from the market, and in the process, return the capital to bitcoin holders. So if I hold bitcoin, I basically hold a product similar to gold, a picture, wheat or crude oil. Meaning, once these products are bought, no one has the liability to buy them back in the future. And the only way I can benefit from them is by utilizing their intrinsic value. But, here a crucial question arises.
Gold I can utilize for jewelry, electronics, dentistry and so on, a picture for pleasing my aesthetic senses, wheat for making all sorts of foods, crude oil for manufacturing everything from plastic to petroleum. Besides, a single unit of these products is pretty cheap. However, in the case of bitcoin the only way I can utilize it is by watching it. That's all. Once I buy bitcoin, my wallet application reads a number from the blockchain, and shows it on the screen of my mobile phone. And all I can do, is to watch that number. To watch it like a picture is watched. When I sell bitcoin to other people, the new holders can also just watch a number on the screen. So, essentially no human being on Earth is capable to do anything after purchasing bitcoin, but to watch a number. Obviously, watching a number is not as aesthetically pleasing as watching a picture of a beautiful girl or a sunset.
And now the questions: if I can purchase a picture of a sunset for a couple of bucks on Shutterstock and watch something aesthetically rich, why on Earth would I purchase a number "1" for $37,000 and watch something aesthetically poor? Why would I pay so much money for a single unit of a product that in comparation to gold, a sunset picture, wheat or crude oil has so low utilization capacity?
Why does it look like you trailed off a bit at the end and almost veered into the world of NFT's when talking about buying images? When you own a share of a company (aka a stock) the company is not liable to pay anything back to you, that is not how it works. If the company does well, it brings in a profit and uses that money to fund growth and/or pay out dividends to the owners of shares. You could put it back on the open market and somebody might buy it from you for a higher or lower amount than you bought it. If a company buys back shares, it is similar to a dividend payment, because they are reducing the pool of shares available and pushing up the price of every remaining share in theory. Bonds are different again, as they are debts of a company - you will get the capital amount back and be paid an interest rate until the company pays it off. Bitcoin, arguably like every other currency, only has value because people are willing to use it as a store of value and it has a convenient trading purpose.
