Smart. Of course, it's for this very reason that it's so hard to get your hands on US minted gold coins, and that you pay a premium for such coins. Investors know that if it comes from the US Mint, it's actually real gold. I'm not entirely convinced that there isn't widespread fraud in what purports to be real gold, FWIW.
That is why my favorite is junk silver. Although it can get a bit bulky. At least it is in small enough chunks that it is more liquid. I mainly focus on half dollars and dimes.