Unfortunately, I have failed to see such jumps in compensation for offers that I received, but I'll admit, I haven't worked with most buzzword technologies (eg: big data).
Hot tech may help you but only for a short time until it becomes commodity. I think niche is far more stable in the long term. I.e. I specialized in rule engines for 7 years (Drools, JRules, FICO Blaze etc). Not many experts in this field. Not hot, not growing but a constantly in demand niche from companies who can't exist without it.