For non American English, British English for example the Z is pronounced ZED. ZEE-Cash sounds like someone doing a bad french accent trying to say “the” cash. (to those brits old enough think 'allo 'allo)
In US English the ZEE inflection goes up at the end, in British English it goes downwards. hence why if you call it ZEE-Cash it would make sense for you also to call the asset ZEEK.
I think sometimes I call it zeecash (not 100% sure, but if I have I was clearly in a state of inebriation), but I always read it as zed-cash.
Also since I am the only person in the world that seems to call it zed-cash, wtf did no one correct me at anypoint in any of the livestreams? huh? thanks @sonya, great moderation. a quick “steve, you sound like a spaz, it is called zeecash” would have been nice.