I think this is the best time to invest in alt coins because the prices are very down and mostly investors are busy with bitcoin due to ETF approval. Once they are done with getting profit from BTC, altcoins will come into consideration. I have seen charts of different altcoins and the majority are down significantly from their peak price, if they touched even half of that price you can earn huge profit.
I think alltcoin's rise will always be higher than bitcoin, and of course the fall will also be higher, so altcoins will have more impact on the market.
So be wise in looking at the conditions and situations when we want to enter the market, especially buying altcoins.