There is a philosophy that says that the best time for looking for a job is when you don't need one.
The rumor circulating is that the Company is looking to further reduce staffing, however a significant amount of this will come from the reduction of cabin crew in the near future. So for the FA's that have their contract renewal coming up in the weeks ahead, I appreciate their concern and think it is normal for them to want to look at other options just in case their contract is not renewed. I would be doing the same if a similar rumor was about pilots.
I agree with you that the Cabin Crew are the Company's greatest asset. Moreover, I believe that these front-line employees actually carry the Company. It is unfortunate that they don't get more credit on a regular basis, which I think is due.