Ahoy Matees! Welcome to Sea of Thieves!
The below video discusses the best place and fastest way to get this achievement after the shrouded spoils update!
KungFuStu72 has supplied an excellent text guide discussing this achievement so I will not replicate that here (drop him a like!), but the below video is a guide that I think is the Fastest way to obtain 150,000 gold in Order of Souls (we almost did it in one night) as well as getting Villainous skulls (Master Hunter of Villainous Skulls achievement) and getting the achievement for killing 1000 captains (Hunter of the cursed captains achievement, which says 700 but needs 1000 as of writing this).
I hope you find the video helpful!