This is the 11756th most frequent Turkish word.
geleceğinin
"Of your future"
Here, 'geleceğinin' refers to 'your future', showing possession and indicating that the future belongs to the person addressed.
Senin geleceğinin parlak olduğuna inanıyorum.
I believe that your future is bright.
In this sentence, 'geleceğinin' again means 'your future', used in the context of emphasizing the nature or state of the future for the subject being discussed.
Herkes, geleceğinin ne olacağını merak ediyor.
Everyone is curious about what your future will be.
Here, 'geleceğinin' retains its meaning of 'your future', intertwined with the verb phrase to indicate actions needed to positively affect it.