Its less likely now more then ever however ASIC miners are making it a bit easier as they continue to pump out hardware that outperforms the last. The coins you should be really worried about are the ones not ASIC proof then run just like bitcoin. Their mining power is so low they could be overtaken with less then $1,000!
Keeping ahead of the problems appears to be the name of the game at the moment @bitcoinflood my reason for continuing to support Bitcoin is that they take the brunt of attacks. Onus is on them to iron out problems, then others follow. Dumping when on down trend feels like you abandon the idea before it has started.
Supporting cryptocurrency taking the initiative to protect from ASIC miners, well that is why I support @superiorcoins development team and community always on the look out for unwanted attacks, sharing immediately in https://www.facebook.com/groups/superiorcoinmining/ or in https://t.me/SuperiorCoin