Throughout the series the entire SH crew and various other people have put their faith in Luffy and usually in these moments it involved them saying "Luffy is the man that will become King of the Pirates"
These moments are usually in times of stress and are used to showcase growth in the characters and are arguably some of the best moments in the entire series. So which spine tingling moment is your favorite?
My personal favorite is the speech Usopp gave to Caeser's subordinates on PH. The look on his face when they insulted his captain makes me so proud of the coward.