Honestly, I don't think Kim Jong-un can even survive another 10 years

He is estimated to be about 168cm tall and 140kg.
He is currently 42 years old, and with that physique, even making it to 50 will be a struggle.
Furthermore, both Kim Il-sung and Kim Jong-il died of myocardial infarction.
There is a family history of heart disease.
He also suffers from severe diabetes and alcohol dependence, and no matter how much money he pours into it or how dramatically he tries to lose weight,
he is likely living a life plagued by hypertension and diabetes, so I think he has 10 years at most.
Turtleman, who also had a family history, was in a less severe condition than Kim Jong-un at around 170cm and 120kg,
yet he ultimately died of myocardial infarction at the age of 37.
I believe the reason Kim Jong-un is bringing his daughter out now is ultimately because he knows he is going to die soon.