Box openers

Its a simple way of making gold daily. What I did was create 2 other characters and level them as high as possible.

I had one of them to buy Expert Material Boxes and the other to buy Old Treasure Boxes daily. Simply open all of them until you have reached the daily limit.

Sell everything that you received and repeat the process everyday, you should see your base money increase as time goes by.

Also, if you happen to meet Howard, you can sell the artifacts from the Cultural Boxes. 300 Cultural Boxes should get you about 30m worth of artifacts.