I don’t think that they will melt it down.Its going to end up in someone’s private collection.
The Poles will prolly have a new one made for display purposes at the site.
It’s interesting to me that it was even possible to filch the sign. Wouldn’t the site draw enough ire from those whose families perished in concentration camps that it would need to be carefully watched to prevent vandalism? Maybe some really pi$$ed off Jew really has had the durn thing melted down.