Lucifer wasnt the wealthiest angel, he could've been but ive never heard nothing of the sort in my bible, what i have read and learned is that Lucifer was the most beautiful angel. It makes sense in the way he fools people in their minds making something bad appear to be ok, like you can get away with it, making the thought of something bad seam "beautiful" if no other words would describe it, thats the depth of his deciet.