i think cBTC, mBTC, bits, XBC, uBTC, nBTC is very hard to remember and to convert to BTC

1 cBTC = 0.01 = 6 USD
1 mBTC = 0.001 = 0.6 USD
1 bits = 0.000001 = 0.0006 USD
1 uBTC = 0.000001 = 0.0006 USD
1 satoshi = 0.00000001 = 0.000006 USD
1 nBTC = 0.000000001 = 0.0000006 USD

all of them are confusing me
but i think we should use BTC & mBTC ONLY
who would buy something with 0.000001 BTC (1 uBTC / 1 bits)

and most exhcange that i see, only use BTC / mBTC