Money brings happiness and money brings security are both lies from both the secular and the biblical perspectives.
Just Google "rich and famous suicide list" and you'll be shocked. You'll find so many people you know and people you don't that have ended their lives. The reasons are wide and varied. Mental health and living beyond your means are recurring themes amongst others.
Whatever the cause, it's a deception to think when you have more money you'll be more happy and more content with your life. The bible is clear about what role money and wealth have in our lives. Philippians 4:11-13 is a concise encouragement for Christians to keep perspective and a Godly attitude to the matter. Not that I speak from want, for I have learned to be content in whatever circumstances I am. I know how to get along with humble means, and I also know how to live in prosperity; in any and every circumstance I have learned the secret of being filled and going hungry, both of having abundance and suffering need. I can do all things through Him who strengthens me.
Concerning feeling more secure about your life situation, money again is a fleeting substitute for trusting in God Stewarding what He has given you, hard work, and having honest dealings when it comes to all things financial is the Biblical path to security and contentment. From Luke 12 Jesus says, "a man's life does not consist in the abundance of his possessions." What you have materially can not be secure when your life could end at any moment and as we all know, you can't take it with you.
I don't believe the Bible encourages us to have "just" enough to live on. The commandment to be generous and help the needy denotes that some people in God's kingdom have extra to give away, some will have so much they will be classified as "rich" in the NT. It's all about where we put our trust.
By placing our trust in Jesus we insolate ourselves from the shallow and fleeting definitions of happiness and security the world is selling.