Theres really no need for a cryptocurrency debit card if the merchants start accepting BTC. Online merchants could also integrate shapeshift.io to automatically do the job for them to convert everything to BTC.
But too bad most of them want or need fiat currency. Maybe that will all change if BTC reaches $10,000?
I don't think that's all about the price.
Imagine that I'm the owner of a restaurant and want to accept Bitcoin as payment method. Someone buys an ice cream worth $5 and pays with Bitcoin. How am I going to pay my my ice cream supplier if he only accept USD? And even if he accepts Bitcoin, how would he pay the company that provides his milk if they don't accept Bitcoin?
Bitcoin is still far for being used as a real currency. For now, almost every merchant that accepts Bitcoin will convert his coins to dollars almost instantly to avoid losses due to Bitcoin's volatility.
Well yeah, The point is merchants--most of them-- ain't gonna be accepting bitcoin/cryptocurrencies anytime soon actually its still far imo thats why theres a decent demand on bitcoin debit cards, look at the companies who established their own.
@OP yeah this is legit some people talked about this on reddit. Wirex has even released their stance on this
https://wirexapp.com/will-my-wirex-card-still-work-oct-15/. Apparently there'll be no loss on wirex card users as the funds on the card will be transferred on their wallet there.