One of the deadliest sins is greed.
Greed would do all that it can to ruin you, that is why they are called deadliest sins.
Greed would make you want everything that you do not have and even when you do have it, greed would tell you that you need more.
You will never be contented as long as you have greed in your heart and that is why it is very dangerous.
It will devour you as a whole, that is what greed does to people.
Here are some quotes about greed to inform you of it.