FUD stands for Fear, Uncertainty and Doubt. It's a phrase one might here often if they invest in new opportunities. You need to keep people who spread FUD with the intent of keeping you down out of your sight and ears. Their narrow focus of your potential and perception of who they think you are need to be locked away from you.
Don't let anyone con, trick, scheme or talk you out of your God given dream.
I love what Will Smith's character said to his son in Pursuit of Happyness while at the basketball court,
"Don't ever let someone tell you that you can't do something. You got a dream, you gotta protect it. When people can't do something themselves, they are going to tell you that you can't do it. You want something, go get it. Period." - Will Smith