The Collar
Scholars have said that whoever sees himself wearing a tight collar, it may indicate his stinginess. If the visionary is a pious person, no one from the people of religion will benefit from him, and if he is knowledgeable, he will conceal knowledge. This is supported by the Quranic verse: "They will be encircled with what they hoarded on the Day of Resurrection."
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.