I've read the novel but i forgot the title. What i remembered about the novel is when the MC asleep (and there would be limitation in when and how long), he would get into another world with fantasy like situation. fighting, resource collecting, finding allies, transferable money to the real world... gems/crystal which could be used in real world (some of it might let him find talents?), there would be time he learns many abilities.. few of those such as golf (he became world champion), etc...