Damn seriously? I thought network difficulty has got something to do with the complexity over the period of time? I mean as we keep saying that for every halving that occurs, the reward also decreases, while each time network difficulty is rising too. Just for the info, in what relation are we saying that network difficulty is rising.
Has it got no relationship with the maths/equation solving mechanism? I mean if it is getting difficult then it is getting difficult to solve right?
Network difficulty is not directly associated with reward halving, in fact the hashrate should decrease in theory. Increasing the difficulty has nothing to do with what we are talking about here, unless you're talking about a pre-image attack. For which, a pre-image attack on SHA256 would go beyond speedups on hashrates which would only concern the first pre-image attack. Collisions and second pre-image attack on SHA256 are by far more potent with regards to the security of Bitcoin.