Your fg's had nothing to do with the realm reset .
It will be the same after the rest and you could still use it for trade .

Just to clarify,
The game Diablo 2 and this site, d2jsp.org, have nothing to do with one another. Except that you use d2jsp's currency (forum gold) to trade for other people's items on diablo 2.
The game reseting has nothing to do with this site. Anything on this site will remain the same after the reset.
but the game itself, will reset meaning everything from Ladder will go to Non-ladder. You can still use your forum gold to buy items for the new ladder season (as others have told you).