Are there limits to how much I can ask for?

If you are good at what you do, here's a tip for anyone watching this as well. People feel that there are these boundaries set to them when it comes to pay. I want you to understand if you are good at what you do, these boundaries don't exist. They simply don't exist. Literally yesterday, I was talking to my friend. I said, "Look, you're getting this job, ask for this much." And he's like, "No, they'll never offer this much. They'll never offer this much.”... Anyway, sorry I'm very emotional about that because I feel like people limit themselves. And what really hurts me personally as well is people undervalue themselves so much. Sometimes, I hear how little people are making. I'm like, "Wait, what? How?" I just don't understand.