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.
I believe not all opportunities seem to bring profits at the end of the day. Although they may be productive temporarily, but you'll know its value won't stay high for long like those shitcoins and meme coins we used to invest. So its always a smart move not to seize every opportunity that comes, but to think more wisely if they can bring profits in your wallet in the long run.