A narrow sand strip connects you to the nearby island only in low tide. You have minutes to cross it, twice per day. You have to drink rainwater and coconut milk. You can fish or eat bananas all day long. Maybe if you are not scared by the claws of the crabs, you can hunt them as well. You will definitely see some of the most pristine and colorful sunsets in the world.
How long would you be able to survive as Robinson Crusoe?