Firstly, its limited quantity. Secondly, it is decentralized and anonymous. And in the third, the fact that this coin opened the doors to the world of cryptocurrencies for us. He will always remain dear and best. Another reason is because it is very difficult to mine.
Man, you have not been listening very well to Bitcoin at all. Every developer even knows this and Bitcoin is only pseudo anonymous. If you want proof, just read the news yesterday about Tether and Bitfinex, all their funds being blocked by the US government and they were a Bitcoin exchange companies.
If you buy and sell Bitcoin, you still need banks. So it does not keep you anonymous.
In my opinion, ypu cannot be completely anonymous in today's world. Really. Not on the internet, never. So, it doesn't matter what we do, we are not anonymous when we use any of electronic devices.