Hi,
Nobody can predict future. You can check the SAP road maps in their web site.
But my opinion is, you should be thorough in at-least one core R3 module relevant to your qualification (instead of wavering to different areas), so that, the chances of employability increases.
Domain experience/business process knowledge is very important (as previously said by experts).
As previously said by experts in this thread (above), still there is a life span of 10 to 15 years for the products released now,so no need to confuse and fear.
regards,
Bala.