tx fee was also one of my motivations to name the rabit. On the other hand tx fee may change through time but rabit will remain constant as 0.0001 btc

I do have a proposal to make for 0.0001 BTC (10^-4 BTC = 10^4 Satoshi)

note that this unit is at exact middle in the scale from satoshi to bitcoin. The first idea that I got is to use the very common unit in ancient Greek myriad that means ten thousand. So it is the exact right meaning regardless if we mean it in relative to satoshi or bitcoin. Of course the problem is that as far as i know there is no standard symbol I thought which letter can be used. Clearly not m. So I thought about r. This gave me the idea:

0.0001 Bitcoin = 10000 satoshi = 1 rabit.