An expression use to describe the act of taking/obtaining advantage of the situation and keep something of value.
1. Play your cards right and secure the bag.
2. Be an intern and work full-time hours. That's how you secure the bag.
3. I cut him/her off but I secured the bag.
4. Friend 1: He/she said he/she wants to make it up to me.
Friend 2: There's your chance to secure the bag.