Got a job? Check.
Knows how to save up money? Check.

Buying expensive stuff can be very dangerous if spending becomes uncontrolled. Credit card debt is an all too common phenomenon. however, I find that spending money on the best that is available, (almost) regardless of cost, is a healthy practice.
It seems that most people buy on impulse these days, that is the dangerous part. If you have the ability to save up for high value items while maintaining a more than healthy savings beside, that shows a good amount of self control.