Secondly, if you have any desire to level up your Steam profile, you probably don't want to sell your trading cards.

The default profile background in Steam is boring. We show you how to change the profile background of your Steam account free.

Your Steam profile level goes up as you get Steam XP. An easy way to get XP? Badges. Except you can't craft badges because you're selling the trading cards you need for them.

For Steam user St4ck, the owner of the most valuable profile globally, it’s mostly badges. Or more specifically, how badges affect the level of their Steam profile.