Difficulty rising little bit. It is going up as times passes.
I think you should mine it and get some of those coins.
Right now only 8GB+ gpus work fine. Big farms that have 4Gb cards are probably not switching to grin at the moment, especially if on Windows. As better mining software comes out allow older cards to mine Grin properly, difficulty will continue to rise. There were talks in the grin forum about delaying the use of 6Gb cards to prevent those diff spikes.