the altcoin market is very affected by the current trend, the higher the profit opportunity the higher the volatility, it is unavoidable, bear markets are normal in the market and that is a common thing, maybe only big coins are able to recover faster when a bear market occurs.
Yeah, recovery phase for different altcoin is always different hence we cannot have any generalized opinion on all altcoins while investing with them. It would be better if you go investing at the beginning of bull run and should book profits by the times of end of bull run; so that we do not need to hold on bearish trend. If you happen to hold on bearish trend then you got only 50% chances for recovery.