Bitcoin ATH : $19,666
Isn't it slightly early ?
We're currently tracking December 2016. Previous ATH should be reached on Jan 2nd. We're front-running it due to global collapse.
BTC's halvening in 2016 was in July and for this year it was in May, 2 months earlier.
So far BTC/alts are tracking almost perfectly with BTC's 4-year cycles from the previous 2 anyway.
If things continue to play out and BTC doesn't get a massive rejection at $20K then alts are just getting started. There will likely be alts with 7-10x gains in a matter of days come January if not a bit earlier.