What kind of information would be so sensitive as to risk crashing the economy over, yet so trivial that people would forget about it because they couldn't acce

What kind of information would be so sensitive as to risk crashing the economy over, yet so trivial that people would forget about it because they couldn't access Twitter for a day? I get that it's more nuanced than that, but I'm really struggling with this scenario; sensitive information tends to get out if it's important enough, even if you're willing to kill a bunch of people.