From the Historical charts i don't think there would be bear market so far, all i see is a positive trend which would like touches back $19k but within 31st December to 10th of January we could see it at $20k to $21k.
I will buy Bitcoin and other crypto if it came to the 14k level cause I think that at time it should be pumped hard and almost cross 20k dollars in coming weeks.
From one's experience i don't even suggest you should buy altcoin anymore, rather while not channel that efforts to buy bitcoin and hold since most at times bitcoin recovers more faster than any other coin out there.