My only concern with the slashed-8 is that at first glance it looks a lot like slash-S $. S and 8 are only one small line apart, and putting the line down the middle makes them look even closer. That, and an 8 would work better for Bytecoins than Bitcoins.
Bytecoins could be bundles of 8 bitcoins .
I'll send you a couple bytecoins for a wordcoin.