I’ve had the Nova card for a while now and it’s been working fine for most of my online purchases, no weird declines or issues. The BTC cashback shows up pretty fast, which is nice, and I’ve actually cashed some out already. Only thing is the spending limits aren’t huge, so if you’re dropping big amounts it might feel restrictive. For something a bit more flexible, I’ve also tried Wirex, rewards aren’t crazy high but they cover more currencies and work pretty much anywhere I’ve shopped online.