Why i always fall?

I had a long period where i had money only for petrol and some food. No extras.
It was hard, but i was happy.
Now, i sold my car and i've some ( not much ) money saved...and i start to re-look at motorbike, cars, clotes ecc Why is so difficult for me to remember and understand that i don't need extra things in my life? Why i don't think to save and have money when i want to travel to search new places, to learn from different culture, to lost myself and find the new way?
I'm so dumb sometime...
The movie "Into the wild" arrived at right time.