I don't think such can happen but if it does, it will surely rise back again. An ubiquitous nature of every cryptocurrency is their erratic character which means they can rise and fall unexpectedly. But I haven't noticed or heard about consistent cryptos falling down to $0.00.
The more the activities in the Blockchain either by investing or developing the blockchain system, the more chances of developing the crypto value.
Thanks for reading and I hope this helps.