The popular opinion now is buy the coins that are down, and when the market recovers that you'll be in profit. While that saying is correct but that doesn't go for all coins. Don't go buying every coins you see losing value just because you think when the market bounces up, they'll follow. Majority are losing value because people are seeing them for what they truly are which are just a waste of investment and time, also a ticking time bomb waiting to explosed.
The memes you all are rushing to buy today most probably will die with this market and won't be much of a sort after coin when the next bull run comes same goes for the Defi, NFT, launchpad projects you're all rushing to get them cheap not knowing you're buying a waste. Choose wisely, follow up the project. See if their developers are working on something or just hiding behind the now popular saying, the market is unfavorable.
Project with visions uses the bear market to build as they'll be getting less distracted with the whole when moon or when binance question for those not listed there yet. The current market situation present an opportunity to research properly and invest wisely, take notes.
I agree earnestly with your last paragraph, projects whose team are ready to work, don't get bothered during bear market because they already have their works lined out and thus working on them such that when the market picks up, it won't be that they were doing nothing, but with what they have developed so far during the bear market will give investors or users the impression that the team are serious. Therefore in all, it is very important for people to be careful of what they buy, most coins are only good during bull market and once the market dumps, the team disappears; use case, active team and working products shouldn't be joked with, these things really matters in a project which aims to grow.