Answer:
Golden treasure I contain guarded by hundreds and thousands. Stored in a labyrinth where no man walks Yet men come often to seize my gold. By smoke I am overcome and robbed then left to build my treasure anew.
I go up when the rain comes down
The more you take of me the more you leave behind.
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?