ABAP is going to be there for a long time; it will keep evolving; you need to do the same. It would also help if you learnt other things like e.g., programming in HR, Java, ActiveX. It heps you widen your skill set.
Not that yoy should learn all that at once. You need to start with one, try to find a job in that area (or you may be able to do both at the same time), then add to your skill set.
ALL THE BEST!