How about applying for a duplicate/replacement GC in anticipation of an unforseen event?
Now you have two copies and you carry one with you always.
If that gets lost you a have another one
Neo
If so, if you travel book two tickets in case one is lost, 2 DL in case one get lost, and so on.
BTW: If you lost your GC and applied for another one and by one way or the other you find you old one, by then this will not work in any scanning machine. And I expect if you claim that your GC was lost and applied for replacement, the USCIS will de-activate the lost one (like credict cards) not to be abused by anyone.