The altcoins have been given the time to put things in order, use case, successful exchanges, development of technology, and liquidity. If some coins don't get most of these after this bear market, most of them are likely to be withdrawn from the big exchanges that could lead to their demise. De-listing will be a form of certificate of death problem as time goes by and this signal will decide your holdings. Perhaps because of the market, if your coin was not listed at any time, the team competence will guarantee holding factor or think otherwise.