It sounds like an old wives tale, but I’ve known many people with ear creases who died young from heart disease, including my own father:
There is a strong correlation between ear creases and sudden death from heart disease, but in reality the correlation is because the ear creased indicate advanced aging.
Here is a photo of my Dad taken a few years before I was born. Note the prominent ear crease and note that he was only 41 year old at the time this picture was taken, even though he looks many years older:
In his case, the ear crease was indeed an accurate predictor of death by heart attack, but the root cause was the rapid aging which was caused by many years of combat stress.