I read an interesting article in the Sunday Paper about Currency Cards. Basically, the gist of the article was that prepay cards are not covered by the Financial Services Compensation Scheme so the money stored on them is potentially at risk. The FSCS views the card as electronic money, not as deposits, and therefore outside its remit.
I found this particularly interesting, as i loaded about $500 onto a Fairfx Card, just as a top up for incidentals, and had no idea that i was at risk, should the Company go bust.
It's pretty much the same situation with Crown Currency, only, once you're in receipt of your Travellers CQS or Cash, you're fine. If the Travel Card Company goes bust before, or even during your Hols, you could lose what's been preloaded.
Food for thought....