There's no literally right time whenever when to buy Bitcoin because we couldn't predict what would be the outcome in the market's price. But we all know that buying at the bearish market is the best time to buy with the cheaper price especially if you're planning to invest in a long term. But bearish might be a good timing but for short term investment, it might affect them negatively since the decrease drop of Bitcoin's value are keeping decreasing causing some investor to lose more investment and get liquidated. But if you panicked in these kind of situation as an investor like moving your funds into altcoins, for sure you'll missed out a big opportunity because if you're holding long enough reaching the bullrun, for sure you'll profit big.
As for short-term investments and the risk of liquidation, you're right. If you are not careful, a bear market can take you all the way down and then spit you out. Still, I dont think you should switch to altcoins out of the blue. Most of the time, thats like jumping from a hot pan into a fire one. My point? Diversification is key, but dont do it out of fear.
But I try to pay attention to the behavior of other investors, as I described before, they run away from bitcoin when the downturn occurs, and prefer stablecoins to protect their money, speaking they are missing a big opportunity, yes I agree about that, as we saw that when The decline occurred in stable coins, the market capitalization of which increased significantly, it shows that most investors out there moved to this stable altcoin.
Yes, perhaps the main factor as we know is excessive fear so they liquidate their bitcoins.