BTG in my opinion is more important update than BCH: in particular for what it has to offer in preventing the mining monopoly that's been more or less of a concern with BTH lately. As such, I wouldn't think of $60 as accurate prediction: I'd expect it to cost in the ballpark of BCH, with a stretch goal of close to $1K in about three months (but that only if it starts at about $0.6K).

All in all, I think it may be better investment-wise than byproduct-coin of a previous fork. YMMV though!