Who said anything about an individual Tesla it’s an entire business with employees and a factory or brick and mortar. Nobody is taking Bitcoin “public”. What the fuck does it stand on? What does it do? Who works for it? It’s a phantom make believe “coin” created by an imaginary Japanese man named Satoshi. It goes up in value because people put fiat money into it and get nothing out of it. People put money into Tesla to drive a car or for solar or what ever else commodities they deem valuable or worth something. There’s a return of a physical product. What the hell is bit coin doing for anybody?!?
Bitcoin has been approved for and currently being invested in as an ETF in the US as well as other countries. The ETF are from some of the largest institutions in the US. Not exactly taking a company public, but close enough in terms of your thoughts. In less than 2 month around 493 million has been invested in the regulated funds.
In the US and likely most of the western world, Bitcoin is mainly treated as an investment vehicle. However, there are countries who use it for its original purpose of being a currency and literally use it to buy food. Two countries consider Bitcoin legal tender. That is one of its purposes. Your favorite go to is the thought that people who invest in Bitcoin believe it will replace the US dollar. You are speaking to a very minor group of people. Most simple view crypto or Bitcoin as an investment and will happily trade it for dollars. Ironically, there was a time you could buy a Tesla with Bitcoin. In my opinion the only reason they stopped was most people weren't actually willing to buy a Tesla with Bitcoin. The excuse was related to climate issues from energy consumption from Bitcoin mining.
There are companies built around Bitcoin, similar to other commodities. People invest in art like the music you claim to create. The value in Bitcoin is the same value in art. It's what people decide its worth.
You bought some ETH, got burnt on gas fees and probably loss more than you gained from the experience. Crypto isn't for you. However, your negative experience doesn't change the growth of not only Bitcoin but the industry as a whole. Will it be here for another 15 years? Who knows, but alot of products fade over time. That doesn't take away from the value it has today.