Unless the price tanks or a heap of new miners flock to this coin, this is still going to be the most profitable coin by far to mine even after the block reward halves (at least with GTX 1080Ti's).
I sold a big chunck of what I mined for 0.00004500 BTC per SIGT last night but I am still mining SIGT with my 1080Ti Rig.
I would have ROI the rig with this price increase if I discovered SIGT a little bit earlier but mined DGB before it.
So far I am keeping DGB and mining SIGT.
They are good coins for 1080Ti.
Exactly the same thing I was mining. I wish I had switched from DGB to SIGT earlier.