For the most part, especially with right after the fork, it seems like BTG will be dumped by a majority of holders.
You're absolutely right, it will be dumped by the holders of bitcoin who were
fortunate to get some free coins, and the market will react accordingly, i.e., it'll
crash. Temporarily, perhaps. The main question in my mind is whether it will rebound
to the extent that holding bitcoin gold (or BCH) makes sense. I don't know if there'll
be any real use for it other than to trade it on whatever exchanges list it. I'm sort
of leaning toward thinking it won't be useful at all, and I highly doubt it's going to
see any real use as a currency, or even as a store of value. We're already seeing
BCH turn out to be a crappy crypto, and bitcoin gold? Yeah, probably it's headed
down the same road.
I did have some bitcoin when the fork happened, so I do own some btc gold. I haven't
claimed it yet, and I'm not even sure if it's really worth it. I didn't get much.