When the Sleeper Wakes by H.G. Wells.

When The Sleeper Awakes is a dystopian science fiction novel by H. G. Wells about a man who sleeps for two hundred and three years, waking up in a completely transformed London, where, because of compound interest on his bank accounts, he has become the richest man in the world. The main character awakes to see his dreams realised, and the future revealed to him in all its horrors and malformities.