I think that if you are in for a long-term game here, you should not care about the price fluctuations. Eventually, Bitcoin is likely to recover and reach new highs, so all these movements and predictions don't matter. If you're in for trading Bitcoin, though, you should not rely on any signal groups and stuff like that. I think the best thing to do is to follow the price on a website like coinmarketcap.com and to follow crypto news. Big positive news often stimulates price growth and bad news like strict regulations, bans, etc. can make the market bleed.