This chapter in Hebrews lists particular points that we are encouraged to have for proper Christian behavior:
Hebrews 13:1 - Brotherly Love
Hebrews 13:2 - Hospitality
Hebrews 13:3 - Support for the abused and imprisoned
Hebrews 13:4 - Sexual Morality (cf. Romans 1:24-27)
Here in Hebrews 13:5 we see a common theme throughout the Bible: the danger of greed.
I'm going to make an assumption, and say that you have already thought of the phrase, "money is the root of all evil." Well, there's no verse in the bible that says this - nor is that phrase even biblical. We see in the Bible that wealth can absolutely be used and enjoyed without sinning (for example, in Romans 14:14). However, we do see that "the love of money is a root of all kinds of evils" (1 Timothy 6:10). Note the distinction, money itself is not evil, but it's where we place our desires that can lead to sin and ruin.
The Bible talks extensively about having an unhealthy obsession with money, and the danger for Christians is that this obsession often leads to discontentment in life. We see this when the Bible uses words like "covet" (Exodus 20:17 and James 4:2) and "jealousy" (James 3:16). Many of us have been told this a lot, but in case you haven't, be thankful for what you have. It's okay to desire more for yourself in life, but when that feeling manifests itself into discontentment, jealousy, or greed, rather than a hopeful or inspired work ethic, there is an issue. Therefore, I encourage you, again, be thankful for what you have, and be hopeful for what you will one day obtain (Hebrews 11:14-16).
When we are pursuing a ever-increasingly strong relationship with Christ, it is built upon trust, contentment, and a forward-looking perspective. And further, if you're using this Verse of the Day as part of your daily bible study, read the next few verses as well. Hebrews 13:6 amplifies this trust in Christ by quoting specific Psalms which proclaim and demonstrate the security that we have in God.