There has been no other fundamental change to Bitcoin that warrants a new ATH
Halving should (in theory) sooner or later make the miners sell less Bitcoin on higher prices, because they now work more for much less coins.
Also FOMO rush is fueled by people's expectations (social engineering helps there) and a bit of market manipulation here and there.
Technological advancement would be a big plus, but a new bubble can easily start without that too.
The problem is that the more the people expect/want/push towards a big price increase, the more the chance it'll be just another bubble, which, when it'll pop, will leave even more people with a grudge against Bitcoin.
PS. My vote goes now for 2021 too.