I'm only really able to answer 1). I've read somewhere that SHA256 can be replaced with some other stronger algorithm with a hardfork. It's not something that cannot be changed. As for a quantum-computer secure algorithm, I'm not too sure what kind of work is being done there.
Having Kraken now trading XMR, I'm sure there will be a lot more interest in Monero. I do think we'll see the bigger exchanges pick up monero as well, since it is a more unique crypto than say, litecoin.
It's great to see some of these altcoin cards, even though it is unlikely that I will use many of them. Is it possible to upgrade your card from anonymous to named so that you can increase volume capacities?
This is pretty unique. I've seen quite a few physical cryptos and crypto themed items, and this is definitely something cool. All the best, and I look forward to seeing future creations should you decide to make more items