Kingship for the Unworthy
Scholars have stated that if one sees themselves transformed into a king but is not worthy of it, they may die quickly. Similarly, if they are ill, the vision might indicate their death. This is because the deceased are not subject to people's authority, just as a king is not subject to anyone's authority.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.