Life in prison is much better than death. I'd rather be jailed for life than die.
Please! You wouldn't last 5 years in solitary confinement.
I could last 15 years, easily!
Fine then. I bet you 2 million that you wont last 15 years. If you do, the money is yours!
For the first 10 years, the young man drank wine and smoked cigars all day. He was provided with such delicacies, alongside music and books, though he didn't read the books at first.
See you in 15 years, friend!
Just you wait old man! In 15 years, that money will be all mine!
For the man's last 5 years as a prisoner, he decided to read books. Since he couldn't live his life in prison, he lived them through the books. Epic quests and adventure, this is how he truly lived his life, and enjoyed it.
Nearing the day of release, the banker realizes that the young man actually survived the 15 years. He'll be ruined, he must pay the young man 2 million, that was their deal. He decides that he must kill the young man.
You've ruined me! You must die!
The old man entered the cell, and found the young man sleeping. There was a note on the table that read that the young man had found inner peace, and didn't want the money anymore, the books truly made him happy. A few hours later, the young man escaped, just a few hours before he was released. The banker took the note and kept it.