"The MERCHANTS of THESE THINGS, who became RICH from her,
How superficial earthly RICHES are (Ecclesiastes 2:1-10-11)! The MERCHANTS were using Babylon (global economy) to pile up their RICHES on a very temporary earth (next verse, verse 21, and Revelation 21:1). They don't realize what true RICHES are and where they are stored (Matthew 19:16-21-30). It is left to the reader to determine what these RICHES are and where they are placed.
Symbolically, these MERCHANTS (leaders of religious organizations) had their priorities turned around (Mark 8:31-36-38 and verses 12-13). They are or will be strong on organizational skills and weak on evangelism skills.
will stand at a distance because of the FEAR of her TORMENT,
In a sense, the MERCHANTS are fortunate to be able to stand at a distance to watch the global economy collapse. However, the fate of Babylon is the same as Sodom and Gomorrah's fate; it has no chance to survive (Isaiah 13:17-19-22 and Jeremiah 50:29-46). Yet the uncertainty of having to live without brings much FEAR with it. From this verse, it is not clear whether these MERCHANTS are watching the downfall/TORMENT of Babylon (global economy), and thus share the same fate in an economic sense as Lot's wife (Genesis 19:24-26-29).
Symbolically, religious organization leaders were so busy with THESE THINGS (plans, structures, marketing, and programs), that they forgot to prepare the souls entrusted to them for their future life. Sadly, these leaders probably participated in the TORMENTS of the 5th trumpet judgment (Revelation 9:5) while under the control of one or several of Abaddon's (Revelation 9:11) locusts (Revelation 9:3). Here, "turnabout is fair play", a person could say.
weeping and mourning,
The weeping and mourning is not for the disappearance of the global economy, it's not knowing how to live without (James 5:1-6).
Symbolically, true believer's are content no matter whether they have abundance or lack (Philippians 4:10-12-20). Their organizations are focused on REVEALING JESUS CHRIST, and will do this in spite of poverty conditions, destroyed sanctuaries, or persecution. When the global economy fails, religious organizations that made their existence dependent upon Babylon (global economy) will be found WEEPING and MOURNING. A person must ask the question, "How intertwined has my church/denomination become with the harlot Babylon (verses 4 and 5)?"