Bitcoin gold is unsuccessful hard fork of BTC. There were a lot of expectations, but happened as usually. Bitcoin Gold is not worth attention at all. Don't know why you are so excited with it. Better to invest in BTC, then in any of its forks.
indeed many people will say that bitcoin gold is not getting successful. but we never know in the future. remember bitcoin up to this point is not easy. took years to achieve and become very popular.
I would not say Bitcoin gold is a failed asset. but if you choose to invest, choosing bitcoin would be better.