I'd just redeem it and sell the physical after you've secured the BTC. The premium is so low and those of us that still have Cass coins have no idea if the private key is still legible under the Holo until we actually pull them. They are amazing collectibles but the higher the BTC $ price the lower the premium and eventually it's just not worth it with shipping, etc..
The upcoming stacks and bowers auction will answer questions for a lot of us on what the market is for these. Later this month !