Well, you want to know the future, and if I could to foresee the future, I would be concerned about lotto numbers, broker markets, commodities, who cares about this tech thing....
Unfortunately I can´t, so I say for you : research in your area what tools/languagens/tecnologies (java. .net, delphi, whatever) are "hot" - via classified ads, HR sites, tech magazines/journals, chat with seasoned people, etc - , and study it, BUT if Oracle databases are your final target, PLEASE give a large ammount of time to learn the Oracle fundamentals and concepts, the database mechanisms, the Oracle technologies, it pays a lot in the long run...

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Chiappa