This is addressing the rich/ill-gotten-gain.
The accumulated stuff, shall be a witness against them.
"Ye have heaped treasure together - for the last days."
Treasure together = Treasured up!×6 This 6 represent the number for man, flesh, deception. These people have deceived themselves: man are the Children of Cain, who was the Son of Satan(aka Kenites).
A reasonable person would understand that the accumulated riches, can't Save them from destruction. But these wicked folks are a different. They get a "woe" from the LORD because they actively work/finance the 1-world-system of Rev.13.
"Last days." 2Tim3:1-9. The last days comes on the 666 = 6 Seal,
6 Trump, 6 Vial. We're at the bottom of the 5th right now.
The last days, will actually last five (5) months.
Prov.13:22 mentions that the wealth of the sinner, is laid up ( in storage) for the Just. These wicked people are Treasuring up, and are so arrogant: but the LORD knows where the storage facility is - and how to have the Just enter in.