Wirex seems to be a good company to use. I ordered a card to test them out around 2-3 months ago and they've served me well since then. They're expanding massively, and with their new utility
token attracting some attention the last few days.
Their whitepaper states they will add their own Stable assets called *W (as in USDW, CNYW etc), and also in the long run they will add margin collateral but it still has no planned date. With this they are a competitor, or you can work together and see them as a friend. I support this Worker based on the good usage I think Wirex can help our platform with.
Their expansion horizon is massive, doubling every year, and their schedule on this is no less, adding new markets all the time. This would benefit us to.
While BTS would be a good start, I'd love to see the possibility to have one or more of our stable coins added to the list of tradeable assets on the wirex app. But that's up to the worker to negotiate the best bang for the buck. It may be to costly to convince them to do this.