Meaning, if you withdraw tomorrow... all your balances, fiat included, will be converted to coins and you will be able to get 55%.
Losing the 45%.
Everything will be converted at tomorrow rates. Meaning if you are all in fiat...
it will be a mess, considering the uptrend you will have sold low and bought high. Really really high.
if you wait 15 September... who knows.
They will tell us tomorrow.
A lot of people will probably take a 45% hit if they were mainly in BTC on the exchange July 25th., the reasoning being that BTC has risen by that much since then so they will not be out of pocket in fiat terms. eg. if someone borrowed $10,000 back in early July and bought 4 x BTC at $2,500 it's now at $4,800 so they can sell the 4 BTC now taking a 45% hit for a total of 4 * $4,800 * 0 .55 = $10,560 and pay off what they borrowed. For other coins it may not be as attractive to take the 45% hit by cashing out early, especially if there is no pressure from borrowing, you have to work it out case by case.