The same angle as in july kept it exciting for bulls these weeks despite they may be the smaller party now.
The similar trend It is their last hope in bitcoin to keep multiplying in price soon.
Any slower trend angle and maybe noone would have dared to keep buying above $4000 these days. But as long as they beleave in this their incentive seems bigger. They hope to win 50% up to "unlimited". Bears also rationally await to win >50%, yet they just dont have much more to dream of.
So it is possible that only 1/3 of people are bulls but they still drive up the market for a while. Unfortunately there are always market participants who are gambling hoping to catch up the past multiplying their money - and who will hurt themselfes badly. So they will risk double.
Lets think of them for a minute.
Lets not be greedy bears. If you have bitcoins when would you sell them in 2010-2020, if not now? you can always buy some back.