After all either market crashes or it goes up and all of us has to do is one god dam thing, you just hodl your crypto tight, either move them to stable coin economy to stop the losses.
I'd go with a different advice and tell people to actually think twice or thrice about the 'crypto' they actually bought — if they actually do something decent, or if it's just your typical useless yet overpriced cryptocurrency. They need to sober up sooner or later, unless they want the markets itself to sober them up by teaching them a hard lesson.
Not missing every opportunities in the market is certainly a smart move, but it will be a lot wiser if you also invest in those coins that have real utility cases in the market, and not those that overpriced coins that also promises huge potentials. Investors do always aim for bigger profits, but they can't expect that to happen from coins who have never proven their worth and are easily affected once the bearish market takes over in the market.