To some extent we can predict if bitcoin is going to recover before before December this year but I doubt if ethereum and some of it tokens will recover before December. Before December lasy year, when bitcoin is getting pump ethereum will also be getting pump but I see bitcoin going up now and ethereum is getting dumping.
It depends because not all the time when bitcoin goes up and down this alts were being hitted with a big dumping. There is a certain movements like bitcoin going up without much bigger dominance can pull altcoins too to go up. I think december would be good for all a small pump or run and go down again in January.