I will say, i'm not involved with either company, but follow both closely and can attest to their validity in the space.  I have used both, BlockCard for some daily crypto spending when I made trading gains and Travala when booking my last trip. 

https://getblockcard.com/use-crypto-and-win-a-10000-trip-of-a-lifetime-with-blockcard-and-travala-com/

By using BlockCard you can win a trip up to $10,000 anywhere in the world - all booked through Travala.   I think both companies are really cool and if anyone isn't familiar, you should DYOR on them.   BUT what I do think is cool is the chance to get a trip just for using the card.