I agree. The 1 BTC bitbill might go for a large premium, but the rest have too high of a value. Premium in BTC terms will likely be limited. But Bitbills are the first ever bitcoin collectible. Super historic.
This is the first 10 cas I have seen go for auction before. I do not know how the market will behave.
GC is a niche auctionhouse that not many people know about.
Going with stacks would garner much more attention from numismatic collectors, but there is no guarantee there either.
The 1 bitbills will definitely go for a premium above 1
BTC. It is also the first PCGS bitbills I have ever seen sold.