Since you already have S7s, the operating cost will ensure you a slim profit over a short time, then nothing. The halving won't bump you too much, but after that, consider a newer miner. Halving will force most , if not all people with even low electricity costs to get a newer generation one just because of difficulty.
I find it very hard to speculate what will happen after the halving. I think the price of bitcoin will go down again since nobody expect it go rise again. Which could be naive but could be hard reality too. With the latter happening you may find yourself in some decent loss..
why it should go down again, it rising steady, it will increase evne more, like it was expected, this will allow miners to remain profitable
the price need only to reach 700 to allow miners to remain in the game, then when the s9 will enter in play everything will be fine for them
It is rising but there is no guarantee it will hold which makes it risky. Bitcoin price/ bitcoin mining depends on a lot of factors which makes it risky all the time.
Suppose we halving is done and in the mean time a lot of hash has been added to the network.
The holders now the halving is done and start selling again.
This would create an immense selling pressure and downwards movement..
In short. One day the circumstances are profitable to very profitable. A week later you are losing money,
I think the halving effect on the price has been priced in. But the block size increase from 1MB to 2MB will increase the price further.