When you know bitcoin will grow in value over time investing becomes something clear and obvious because it can take 5 years before you can take some profit but eventually you will.
I'm not spending my money, I'm still saving. I know that one day I'll be too old and too weak to think of working and that's when all of this will come into play.
old people being abandoned by their children and this is why its really that important that savings is a must while you are still young because you dont know on what comes next.
Now its better to have other multiple source of income so that you do have the chance or ways for you to save up at least for future plans.
Stay fit and healthy and live according to your means and not into your wants.