People are always trying to golden rule of investment. Buy low, sell high.
But both could be challenging.
Buying low: you never know when the bottem of a dip has been reached. Most of the time, the dip is followed by an even deeper dit.
Selling high: this is even harder to predict, the ultimate bottom can be predicted because this is 0, but the top. Mmhh. impossible. That's why you should have a selling plan! Not selling every coin at once, but some % of your share.
Back to BTC. I do think that it will rise again. It can be best compared to gold, but then a digital version of it. Big companies are spreading the FUD because they do see their reason for existence vaporize. Maybe they don't believe in the cryptos, but for sure see lots of potential in the underlying blockchain technology. The companies, who are playing the middle men in lots of transaction are at risk. Their shareholders will be mostly bank and big investmentfunds. So they will not let it go down without a fierce fight, this is what is going on at the moment.
Once we will see some mild regulation of the cryptomarket, the non investors will have more trust about the cryptomarket and will start to invest, this fresh money will bring the crypto markets to new heights!
My 2 cents.