Answer 1
Hotels not only accommodate guests but have a real estate component since the physical property of the hotel is an asset that can be bought and sold.
Answer 2
The Titanic was the largest and fastest transatlantic ship of its time and also had the reputation of being indestructible. When it sank, this provided lots of material for a movie. Hollywood then added a rich/poor angle and romance to the mix, which made the drama even more compelling.