I come from China, I like to talk my thought about 4 Billion issue, in China  statutory measurement units , we will call the 4 billion is 40 yi (yi pronunciation is E (in A B C D E), and 40 is not so bad as 4 in China culture.
But i don't know other Asia issue about 4 billion.
if we still want change the quantity, I suggest the number 3.99 billion,because 3.99 billion =21 million*190.
and 21 million is bitcoin quantity, while 190 is a good number in China, it means live long, bitcoin*190 will means we can live longer than bitcoin.