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 commands a large group of irregular fighters with no known government affiliation, and his name, security officials tell me, inspires obedience or fear in villages along the road.

安保公司的管理人员告诉我，公路沿线村庄里的人都害怕和服从他。

youdao

Some are concerned about the privacy implications of having their voice recorded — granted, many businesses already record customer service calls — or they fear security breaches.

一些人担心录制自己声音可能带来隐私问题——的确，很多公司都对客户服务电话进行了录音——或者是，他们害怕安全漏洞。

youdao

While those choosing to exit would lose their Medicare subsidies, they would gain something more precious: the freedom to use their own money to buy the insurance they want, without fear of government rationing or losing their Social Security benefits.

WSJ: Dick Armey and Matt Kibbe: The Medicare Test for President

Out of fear for their security they declined to be identified or directly quoted.

CNN: STORY HIGHLIGHTS

But if the money were to come from the EFSF, well in those circumstances Finland has said it would fear that the money would be too much at risk of loss - so it is demanding collateral or security for its share of any such loan.

BBC: Messy Spanish rescue