Even your shiny new big screen t.vs can be used as huge microphones as surveillance devices for so called agencies for your national security.
Just some bored cia/fbi agents wanting to listen to lonely couples having sex on a saturday afternoon while the kids are at grandma's house.
I'm sure it doesn't happen that any 'cia/fbi' operative does a search for the string 'bitcoin' in the sea of data, finds several, then decides to have a peek at the cell phone belonging to the individual who generated the string. Nope. Probably never happens.
Remember, it is not a matter of monitoring while you happen to be typing in a password. If a full record of everything you've typed is available, the password you typed 5 years ago is still kicking around. It is currently pretty unclear who has access to the full archives, and if/how that may have changed when Obama relaxed the '16 intelligence agency' sharing of unfiltered material in his final weeks in office.
Almost no data is actually viewed by humans. Algorithms are run over it to try to gauge society at large and identify trends and such. That said, I bet a modestly capable coder could hack up a little script to match likely passwords to pilfered Bitcoin wallets with reasonable accuracy, and have a ton of results within microseconds of executing it. If they have the right access.