I'd take the gold. The half dime is nice but doesn't have any exceptional eye appeal. And I tend to like bigger coins. I think for long term resale the gold a better investment
I have to disagree the H10C is a purely numismatic value where as the overwhelming value of that gold piece is just its melt value. Sure gold could spike again for a short period of time like it did and the Gold could be a better investment from tha standpoint, but long time unless that series gets a few million date and mint mark set builders its a mostly bullion coin price wise.