It will only implode by sabotaging it.  Blowing up the risk corridor was the first successful step which forced some insurance companies out of the market.  That resulted in the increased premiums of last fall--just before the election.   "Implosion" and "death spiral" are words that have permeated Fox News and the right-wing fever swamp.
The CBC has reported that the ACA is, in fact, doing well, despite the first-wave efforts of the republicans.  Tom Price and the Freedom Caucus have many more tricks up their sleeves, and they are anxiously awaiting to utilize them to cause maximum damage.  Then those manly men will turn around and blame the black guy, as is their custom.