I do not know their official status on this but it seems logical to only accept a selection, there's no benefit to accepting every cryptocurrency, it's unnecessary cost and effort.
Agreed and that makes sense. Apple don't need to allow every cryptos.
But what I am really curious is how some minor cryptos are chosen by Apple's strict rule.
For example, Voxel and Wave are good alts but why not other good alts are still not allowed by Apple?
Hmm, I have to survey for this more..