Many have stopped investing and trading in other coins, including Bitcoin, after suffering losses from investing in Bitcoin. But now it appears that the market is rising slightly. So during this time if you can carefully observe the market and trade then I think it is possible to get good amount of profit from this market. And there are many people who currently buy and hold a lot of bitcoins, they can trade from some part of their holding if they want.
Holding will be the perfect decision for times like now that the market is very uncertain. The price of Bitcoin has been moving up for sometimes yet people are still calling for the dip as they believe we haven't bottom out in all the dips that have happened in the market. People believe this dips were as a result of the different unfortunate events that unfold on the market like Luna collapse and SBF fraudulent acts.
Only Bitcoin and very few altcoins are moving in price and they are the only choices to go to if you want to trade in this season as you can buy Bitcoin and sell while making lots of profits from the price difference with in the day. As for trading alts, that would be a no since nobody can be sure of which one is surviving and not getting dragged down.