When the mining reward go down from 3 to 2 ETH it means a (3-2)/3=1/3=33% reduction. The price of a coin is generally correlated with the cost of mining. The cost of mining Ethereum goes up 1/(2/3)-1=3/2-1=1/2=50% so naturally the price should with time continually seek its way to 50% more than the balanced price level before the reduction.
The reduction of the mining reward with 1/3 should lead to a price increase of 50%.
this is the scenario that all miners will like to happen, but the reality can move backward the ETH price
in that case, the other major daggerhashimoto minable coins could receive support from ethereum miners, like ETC, CLO,
be prepared for all scenarios