Some people are so used to their career or business, that they feel tremendous anxiety over the possibility of losing their job, or of their product becoming obsolete.
This worry is analogous to a certain blacksmith's statement, "How fortunate I am that I chose to become a blacksmith. If I would have become a jeweler, I would have starved to death. In the 30 years that I have been a blacksmith, not one person approached me about jewelry."
The Almighty can always supply a person with different ways of earning a living. If until now you chose one way, you can still be successful in many other ways.