First of all, we all know that crypto market is so volatile thus most cryptocurrency prices are inclined to fluctuation which is why bearish and bullish market become the common words in crypto sphere. Secondly, this bear and bull market is like a cycle. Once the market is down the possibility of going up is high, but we don't know when it's going to happen since this crypto market is so unpredictable. Finally, most of us believe in the famous quote 'history repeats itself' so, it's a common knowledge that BTC has reached its ATH last December, looking at the crypto market today, majority of us would think it might happen again.