As for me, I also think that after fork bitkoin drop a little. Most likely not immediately, but gradually. At this moment, the strongly defeated altcoins should go up. So for a couple of weeks, hide under your pillows your dogs and litecoins. They still fit you. And they will at least be better than bitcoin gold. And then again pump bitcoin.
I think as long as Bitcoin doesn't have seen the absolute top, wherever that will be, altcoins won't see any significant bullrun.
The real question is, what's going to happen after the B2X fork? And messy will it be? If it should become as bad as some think the bullrun could be over for some while and the bears would be back. That's the time when altcoins probably will shine again.
If Bitcoin however just dips and the B2X becomes a nothingburger we may see continue the rally until some point in 2018 or even another year who knows, especially when more and more institutional money starts flocking in. In that scenario some alts may see some runs but the majority probably continues grinding down.
Just my 2 cents.
