BTC broke ath and if its a true break out for astronomical numbers alts should also get sprinkles of light. If we go by the pattern of 2017 bull run for alt coins, it will come fast and leave fast and come back one more time for a epic lift off before completely getting demolished again. If we follow the same pattern we should see a 6~10 day bull run for alts starting in the next few days over. The catalyst can be something simple as equities and BTC being too expensive with people have some money over Christmas with US stimulus to kick in soon. All those news might just be an excuse for the alts to run to catch up to the BTC move before selling off for further bull move for BTC.