Traders by definition have to be an active bunch, after all you need to read several charts and you need to do it more frequently the faster the chart moves, after all you need to interpret a chart of 15 minutes 4 times in the same period of time that you will interpret a chart of 1 hour only once, so I do not really agree with you unless you are actually talking about investors instead, investors can afford to be more passive in their approach to the markets as they are more interested in the long term than in the short term.
That "activity" should be something that could be risky for the trader at the same time. There isn't really a big deal at all if you just end up doing a long term investment where you hold it for a decade or more. Whereas a trader would have to be active and constantly do something and that ends up being a terrible situation.
So, just focus on what you are doing at that moment if you are a trader and be always ready for the current situation and always be ready for a drop, so have your stop loss and so forth ready. This way you could limit the loss as well. There isn't really a good deal to be trader to be fair, just be a long term investor and you would be fine.
There are traders who are really good in making profits regardless if the market is having a big crash or the market is dumping. But the risk is always higher compared to long term hodlers. Despite of it, some traders still manage and excel in their chosen career because they have the abilities and developed skills which will help them being passive traders. And once you're into trading, at least you should know when to trade best and when not to.