Some people will always argue that Bitcoin is been used only as an asset. But day by day there has been an adoption of Bitcoin as a currency. For airlines in the United Arab Emirate to have the option of using Bitcoin and other coins means that customers have demanded it.
Airlines like Emirates, Air Arabia, Travala and Alternative Airlines, now support cryptocurrency payments for bookings. This is an indication that Bitcoin adoption and use are growing. So the perception that Bitcoin is used only as an asset is not true.
https://cointelegraph.com/news/how-to-book-a-flight-with-crypto-in-the-uae-step-by-step-guideTo be honest, cryptocurrency adoption is just one step away from being adopted everywhere, what it needs is just the proper payment gateway by the big player and educate them about it.
I've used coinbase's crypto payment gateway and it's been seamless. Unfortunately some company out there don't have idea about it but eventually it will catch up and they will know.
I'm waiting for that day when crypto payment is as easy or even easier than paypal payment or even credit cards.