Some people think change in their lives is unnecessary, because they would like to
keepmaintain a regular
lifestyleslifestyle.They believe that concentrating on one thing can improve their specialized skills, which means that, they are more likely to make more money.
... there is no logical connection between specializing in one thing and making more money. You need to justify this argument.
They also think that money is one of the most important things they considerate and that changes may pose a threat to their current lives.
You are now going out of topic. Your prompt does not talk about making money. It talks about how people react to change.