Why Economics is no longer so economy

I've studied H2 Economics for quite a while now and I have to admit it was much harder than I thought. The concepts are more than meets the eye. But one thing I do realize is that Economics have become more and more unpredictable. We should know that our economy is fragile and there are surprises here and there. Nobody expected Lehman Brothers to shut down and nobody expected the world to be engulfed in another economic hurricane.

What I'm trying to say is that we should continue studying Economics but, we should not go so much by the books anymore. our economy has started to change and one day you may be prospering and who knows, you'll go bankrupt the very next month or year? There's no such thing as memorizing Economic graphs or terms. You have to know the concepts and when needed, you know exactly what to change to keep your company alive.