Projects and therefore coins can fail.
But once listed on one of the biggest exchanges, they would hope to remain listed.
It seems these coins are at risk of delisting due to the downturn in crypto over the last few months.
With only a 15 day grace period before a warning notice is issued, the pressure is on these coins.
Over time as the industry grows many coins may come & go, but hopefully those with good or the best product ideas will survive.
In this case they seem to be in danger due to HODL. If the coins were being traded then their volumes would be up.
Perhaps HODL is not such a great idea after all.