In patch 2.0.1, Paragon levels were completely reworked to grant bonus paragon points that you can invest in stats and perks to strengthen your character. One of the options for Utility points is increasing Gold Find, at a rate of 1% per point, up to a max of 50%.
However, Gold Find has a cap of 300%:
I presume that the massive gold find bonus you get from higher difficulties is exempt from the 300% Gold Find cap, as it wouldn't make sense to offer rewards like 400% Gold Find if you couldn't use it all. However, I'm less certain about the Paragon Gold Find bonus.
Is the 50% Gold Find you can gain from Paragon levels also exempt from this cap, or are those points wasted if you happen to have a lot of Gold Find on your gear?