I always remember the quote from Ray Kroc (Businessman who built Mcdonalds into the most successful fast food operation in the world):
If any of my competitors were drowning, I'd stick a hose in their mouth and turn on the water. It is ridiculous to call this an industry. This is not. This is rat eat rat, dog eat dog. I'll kill 'em, and I'm going to kill 'em before they kill me. You're talking about the American way - of survival of the fittest.
In industries in which I worked, this was often. Yes, such an attitude is stressful. But it also helped them to be better, especially in marketing and customer service.
On the other hand, bloggers, for example, stick together.
Does it depend on the industry a person is in? Or it depend on personalities? Or some other factor?