It's not "inflation! proof!" Nothing is. But gold rarely if ever suffers inflationary periods
Considering hyperinflation. Gold has never suffered hyperinflation. You could confidently say it is hyperinflationproof. Whereas it's a commonplace in history that fiat currencies suffer hyperinflation. So that might be what you have in mind.
The SGBS (USD denominated) product is there to appeal to large institutional investors who keep large amounts on USD at hand and wish to trade gold. (Private, retail investors with USD in their account may also choose SGBS).
The SGBX (GBP denominated) product is there to appeal to mainly private, retail investors in the UK who wish to trade gold but do not ...
It's dead simple, since you are starting with pounds, just get the pound one.
At the end, you can just take pounds out.
If you went with the USD one, you'd have to "change twice".
Thus, they're simply offering the pound one as a "convenience to you" - so to speak.
(Note that inside their enterprise, they essentially "change on every transaction" in some ...
You can print money, but you can not print gold, right?
But we mine gold (thereby increasing the supply), and recycle it.
The bottom line is that -- as a commodity -- the price of gold is driven by demand.
The three demand drivers are:
Industry (mostly electronics)
Sometimes speculators want more due to fear, ...
Similar to @Lawrence, it isn't completely clear to me what your exact question is but I'll try to offer some thoughts which might help.
First, I'd like to clarify with my interpretation of the term "inflation proof" since I haven't found a clear definition on the internet.
I would call an asset inflation proof if it appreciates at least at the inflation ...