First, like gold. Bitcoin is used as digital gold today, bitcoin is a finite resource. Only 21 million Bitcoin will ever be produced, so it’s a deflationary asset that benefits from relative scarcity. Only bitcoin is pure digital gold, all the others tend to give up some of the aspects of Bitcoin. For example, being totally decentralized and having no central control. That's the first one they have to give up to try to have a business model. Moreover, Bitcoin is an asset with a high expected return, and these assets tend to be more volatile.