There are a few ways to earn bitcoin for free. The most common way is to be paid in bitcoin in exchange for goods or services. There are also a number of websites and apps that allow you to earn bitcoin in exchange for completing tasks or watching videos. Finally, you can also earn bitcoin by mining for it.
While there are a number of ways to earn bitcoin for free, it is important to remember that there is no such thing as free money. Any time you are receiving something in exchange for your time or effort, you are not really earning it for free.