The definition for people who don't understand:
Materialistic describes a person who is markedly more concerned with material things (such as money and possessions) rather than spiritual, intellectual, or cultural values.
To some extent, yes.
I'm a Cancer, and my personality is a function of my home and all of my possessions, one of which is my computer. Without that, I'd probably be lost. I spend all my time trying to make money from my knowledge though.
Knowledge is a function of money in my opinion.