It's pretty common to lose everything.
What
@Ryzengang is showing is how to not update to patch 8 because, if you did that, you would lose everything. When the full game comes out, I don't think you'll want to stick with whatever the last beta test version was because that will only cover the first portion of the game. When you got to the end of the beta test version, you would have to restart (probably) to get any further in the story!
You've got a LONG wait, though. But then, you've gotten BG2, and it's a long game.