As far as I understand (and I could be wrong here) your estimated account value is tied directly to the current exchange rate of STEEM to USD, obviously that would mean when STEEM falls in value so does your estimation, if you look at any exchanges you'll see that there was a dip in value, so I wouldn't worry too much about it, STEEM will keep going up eventually.
Anyway... FIAT was sooooo last year mate! :P
Thank you so much for your information !