I think there is no merit in choosing a job with respect to Job security.
As a true professional one should look at putting in use the knowledge earned & enhancing the skills one wants to identify & enrich. There is no such ideal job which will answer all the questions. If an individual has risen as a Chartered Accountant, he should not fear of job security & working hard. All these are just attributes but the real kick is based out of satisfaction which you get. I agree some like only money, some want a balanced work life, some want job security but I would request all the budding CAs to look back as to why you did CA.
I have my own example, I started off with an opportunity through CA Campus recruitment into a PSU Oil Mfg Co. I was not satisfied with my full working life, growth prospects, attitude of people around me in terms of working & learning skills. I moved onto Banking starting off with an MNC bank. Fortunate enough I got a lot of satisfaction after hours of working, enhancing my knowledge levels, developing my key skills. Off course I had to sacrifice on my work life balance. From there I moved onto another MNC Bank where I enjoy work life balance as well. At the same time, I have some of my friends who used to study with me, are practicing now (either on their own or joined their parents / relatives practice). They work all Saturdays even Sundays, have no time for any social functions, but are much much more satisfied than me! They see real charm in the professional activity they do.
So to conclude, all these attributes are subjective, you may get these at some point in time, you may not. It is better to be happy than to be worried. Life moves on & so should your knowledge base. It is important that you hone your skills rather than compare.
All the best !