Step 1 : Introduction to the question "4. How could we say "Uneasy lies the head that wears the crown" today?"
...1. I'm having trouble with my capped tooth 2. His hat doesn't fit properly 3. Nobody at the top level is ever really secure in their positions 4. I have a migraine There's always someone or some organisation ready to step into that positions if given the chance - or plotting to do so. This term was very applicable back in the days when kings ruled various kingdoms in particular. There were many who wouldn't hesitate to stab those rulers in the back, figuratively and literally. The cup of poisoned wine presented under the guise of friendship, for example. Today, this can be seen more and more in the massive security details that always surround those people in the top positions in the land, such as the President of the United States. It would have to be an exceptionally strong person who could sleep well at night under such circumstances.