Work in an IM firm: For better or for worse?

I used to work full time in an SEM firm that specializes in Adwords management. It was a job that I undertook for close to a year and during that period, I got the chance to manage hundreds of campaigns, and for firms in all kinds of industries.

I've since left the job to pursue a part time degree and at the same time, got myself affiliated with IM. I have been able to earn more than what my previous job got me, and I'm confident that I can make it even better in the near future.

Now, as chance would have it, I have been given the chance to work in an IM firm again. Only that this time round, the prospects, reputation, and prestige of this company is much better.

I will be taking on a more important role as well, and to be honest, I am pretty excited about the prospect of this new project.

Now, I'm really at ease with what I'm doing now (affiliate marketing), and I truly enjoy the freedom that it gives me.

But on the other hand, I do have concerns over its long term viability so I do have fleeting thoughts of getting a job every now and then.

I would like to think that this job opportunity could be a good springboard for my career but I would just like to hear your thoughts.