Alexander's last words :"Bury my body, do not build any monument, keep my hands outside so that the world knows the person who won the world had nothing in his hands when dying".
The second wish of strewing gold, silver and other riches on the way to the graveyard is to tell People that not even a fraction of gold will come with me. I spent all my life earning riches but cannot take anything with me. Let people realize that it is a sheer waste of time to chase wealth.
And about my third wish of having my hands dangling out of the coffin, I wish people to know that I came empty handed into this world and empty handed I go out of this world.