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 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?
Bitcoin is a blockchain that has been created and has a supply of 21,000,000 on this earth. Fortunately Bitcoin does not have a form like the objects we see everyday, if Bitcoin is in the form of objects, more and more people will imitate Satoshi Nakamoto's creation so that the supply of Bitcoin will increase and the Bitcoin price will be destroyed.
There are several things that make bitcoin valuable, namely because bitcoin can be used as a means of payment, Bitcoin can also be used for trading and most importantly the government cannot control our assets which are already in the form of Bitcoin (only we have the authority to control the Bitcoins we have) this is what makes someone want to buy Bitcoin.