Dollar thefts occur all the time, and sometimes in large quantities. Does that make the dollar scary?
This is simply false. The problem is that someone can still steal some of your money after you change password -- if they can obtain the old password and they can access a backup of your wallet using the old password. Neither of those are "pretty easy".
... If the dollar falls, the Fed will jump in."
That is laughable statement. The dollar has fallen 32% against the euro in the last 10 years. Where is the Fed? Why hasn't it jumped in?