Very fast! if the bullrun comes Altcoin will experience bullish and always increase in every correction,
so if you lose the moment to buy Altcoin like at a bearish time like now then it will be a regret,
because altcoin has fallen more than -90% from its peak and now the price very cheap, buy and hold is a good way.
The sentiment is same, always purchase the coins during the bear market but the most important thing is that, when you invest in alts make sure you select the coins that are technically sound rather than investing in any shitcoin created for pump and dump. In the mean time you can invest in hyped projects checking their team members and promoters just to ride the rally which will bring the most profit.