because altcoin still doesn't have potential. just look at the speculation about altcoin at this time to discuss more about whether altcoin can survive or not. there is nothing to discuss about the possibility of altcoin coins going up.
from here we can only conclude that many people are pessimistic about the rise in altcoin. so this is why even when bitcoin stabilizes altcoin only goes up a few percent.

Why Altcoin has not been priced where Bitcoin Stable has been in the same place for a long time.