It will last for as long as dumb noob money thinks "btc is too expensive, I've missed the train. Instead, this coin over here is a lot cheaper and has a cool name, and is outperforming btc recently, so I'll open a leveraged position on that instead and hope it works out. Look how smart I am."

They'll keep doing this until they get liquidated and bitter and leave the crypto sphere altogether. Or see the folly of their ways and convert what they have left to btc. Weak hands.