Just follow the cryptocurrency news and speculation mate I think those things affect the cryptocurrency market very well
Any news aggregator? i mean, not a single portal but a platform showing news from different news portals, twitter, redit and more.
My favorite is faws.com. I find it very easy to used and like what you are looking, if gives you the current state of crypto sphere. If I'm not mistaken they pull or aggregates around 40 news portals. So very handy, specially if you are looking to invest on a coin and wanted to follow and get a accurate price listing.