I am not an economist nor do I have much experience on business but I think a person must have a big and specific goal and move towards it and never change the business model or style frequently. One should try only one or two businesses until he succeeds. If one keeps changing his business again and again then he will not be successful in any of his business.
You don't need to set goals that are too big for you, set goals that are within your capabilities and conquer each milestone one by one. In business, everything needs to be conquered step by step, we should not be ambitious that one step can achieve success.
Changing your business model or style is a good idea if your business is outdated and no longer profitable. But if we keep changing models and styles, it shows that we don't have a specific plan for our business and that only leads to early bankruptcy.
But to run a business you must constantly develop new strategies that will always keep you ahead of other alternative competitors only then you can be successful in business. In the competitive world there are always new demands and new inventions coming in the market due to which a businessman always needs to upgrade himself.
Overall, ensuring the survival and success of a business is extremely complex, not just based on 1 or 2 factors that we are mentioning. Therefore, anyone who wants to start a business must always prepare full knowledge about that field first and time will give us more experience. Business is a process and requires huge trade-offs, it is not as easy as we think.