Bitcoin has no physical, Bitcoin is a digital asset that has a high value so we can benefit from it. Even though Bitcoin is not physical, I have experienced the benefits of Bitcoin and it is real, so I don't think there is any reason not to believe in Bitcoin. Indeed, there are many other investments such as buying physical gold, but I am more interested in Bitcoin because it is easier to store and more profitable than gold. It's all up to you whether you want to believe in Bitcoin or not.