Maybe they "stop" because there isn't enough money to take the next step, or they are afraid to leave the certain safety and security of their current job to change careers - the fear of the unknown.

也许，我们不得不停下来，因为没有足够的钱去迈出下一步，也或者我们害怕离开固有的安全保障，害怕因改变自己的事业而失去现有的稳定工作——对未知的一种恐惧。

youdao

He said that the two main issues with architects in this role are that they can't measure or quantify the issues their organization currently has and that many of the architects fear change.

他说架构师这一角色中，最大的两个问题是架构师不能度量或量化他们组织目前存在的问题，而且大部分架构师害怕改变。

youdao

Consumers have nothing to fear as there are emphatically no plans to change the recipe of Dairy Milk or create a Milka hybrid.

消费者不必担心牛奶巧克力的配方有所改变，妙卡巧克力会出现混合产品。

youdao

But the initial expression of rage typically comes from people who really do have some fear of a loss of their social position or fear of a loss of their social status because of some change that they see occurring and a change they see as threatening them.

NPR: Health Care Debate: Why So Much Yelling?

Was it fear of change or expertise that was getting in his way?

FORBES: Innovation For Dummies

Freedom is the ability to change jobs or start your own business without the fear of losing your health insurance.

WHITEHOUSE: Remarks by the President at a Campaign Event -- Fairfax, VA