Easily solved by having a "Double-check" feature where one or more officers/leaders will be required to approve of a said action or transfer. In this case, gil, there will be thresholds as to how much approval will be needed depending on the amount being withdrawn.

Example:
100k requires the approval of one other officer, excluding the person attempting to withdraw.
1m requires the approval of the founder of the fc or three other officers, excluding the person attempting to withdraw.


Complicated? Yes. Safe? Yes.