That is not account data. Also, the internal market will be removed, because there will only be Juice (formerly VESTS) and the non-transferrable Stake.

If you are referring to your Steem and SBD balances, they are both going to be converted to their base VESTS, and combined to form the new JUICE balance. I am thinking that probably JUICE will actually be VESTS, divided by 1000, so there is 3 decimal places of precision, plus however much more precision that goes deeper than that. I don't think there is much more precision. It's fixed precision binary numbers, so the decimal place in the decimal representation is a human convenience, I think possibly there is 2 bytes of precision below the Steem decimal place, for example... The binary decimal place looks a little different, but it calculates the same way. The precision allows for 16384 total values inside the 1. The decimal places will roughly be 4, I guess, 16384 gives you 4 clear decimal places but it doesn't quite go to 0.0001

Blockchains use fixed point numbers, because floating point numbers are not deterministic.