All currencies need to conform to the ISO 4217 for 3-letter currency codes. This allows compatibility with current standards in use for computerised accounting sytems
The first letter is reserved for the country that the currency belongs to - so USD, CAD, GBP, etc.
But X is reserved for...
I was browsing through the agenda for Money 20/20 Europe (as you do) and I noticed that Ripple has a speaker listed for their "C-level perspectives on tomorrow’s payments landscape " talk.
No DASH representatives...and this is where DASH will fall behind. DASH needs representations at industry...