Crusoe does have periods of despair when he realizes he is abandoned alone on a deserted island, but he also has the ability to pull himself together and see the bright side of his situation. Rather than spending all his time lamenting what he doesn't have, he focuses on what...
Crusoe does have periods of despair when he realizes he is abandoned alone on a deserted island, but he also has the ability to pull himself together and see the bright side of his situation. Rather than spending all his time lamenting what he doesn't have, he focuses on what he does have, and, more importantly from a business point of view, exerts ownership over it:
I was lord of the whole manor [island]; or, if I pleased, I might call myself king or emperor over the whole country which I had possession of: there were no rivals; I had no competitor, none to dispute sovereignty or command with me.
As the above quote shows, Crusoe sees he has cornered the "market" of this island and therefore has all the advantages that come to the owner of a monopoly.
He also carefully marshals his resources with forethought and prudence. First, he realizes it is imperative to salvage as much as he can from the damaged ship before it sinks, and he does so. Second, he surveys and takes advantage of the resources at hand. For instance, he gathers up grapes, lemons, and limes so that he will have store when the wet season comes:
I found now I had business enough to gather and carry home; and I resolved to lay up a store as well of grapes as limes and lemons, to furnish myself for the wet season, which I knew was approaching.
He also has the forethought to cultivate grapes and to dry them for a winter food supply:
In this place also I had my grapes growing, which I principally depended on for my winter store of raisins, and which I never failed to preserve very carefully.
He recognizes the need to work hard and not simply depend on the island to supply his needs without any effort on his part:
I was not idle, and that I spared no pains to bring to pass whatever appeared necessary for my comfortable support
Crusoe has a fundamentally economic mindset. and interprets the resources around him in terms of the economic benefits they can bring him. This goes as far as his thought, when he sees cannibals row to his island for a visit, that he would like to capture and enslave a few or his own benefit:
I fancied myself able to manage one, nay, two or three savages, if I had them, so as to make them entirely slaves to me, to do whatever I should direct them
With a mind constantly at work devising ways to bring more profit to himself, it is hard to imagine Crusoe failing to prosper in the business of running the island.