I save bitcoin for my future and for any unforeseen events that may occur. If I need any emergency cash, I will probably don't have to borrow from anyone because my bitcoin savings can take care of that. While I save bitcoin for the future, the salary from my day job takes care of my daily life.
I had a dream of buying something very expensive initially when I started with bitcoin. However, priorities change and now I own a house and I am married. So my bitcoin savings can help me to live a better life if I face a difficult time. It's good to have savings and a bigger goal.