I think a dead coin is dead, even if it may be pumped again. Only if a big community revive a coin, that maybe will work.
A very short and temporal pump attempt can happen, I've seen those type of pumps before but later the coin seems to be dead again. Don't buy with these kind of coins and don't get hyped if you see a coin got 1000% increase within a day.
Those type of coins are obvious being moved by pump and dump groups and whales. They are pushing others to the bottom while the early buyers will take opportunity of the money came in. Dead coins shall be dead though they can be bump for awhile.