I don't think we should try to get doggo gold.
Cannai, to me, seemed to catch on the it would be valuable, but steered the conversation away at that point (assuming he wasn't trolling. I don't think he was, but honestly it's hard to tell). I think trying to push to get it wouldn't be likely to work. Certainly, the last time we had a deal for 7th path gold it went on a very particular direction, and if anyone caught wind of the deal, it would raise red flags. The fact that we don't have much to offer that I can think of, and the dogs are currently busy (Dragon war plus watching the near-pangolin border) means I can't see them making this a priority.
Also, at some point I'd have concerns about inflation, though I haven't sat down to look at the numbers (that's a lie, but we're past marked for economics and I'm no Rihaku). A sudden influx of gold is exactly the sort of thing to destabilize the economy, which Asuma has already... Advised against.
I think that we're better off investing in businesses that produce revenue, rather than extracting gold. Though it was be hilarious (read: awful) if this led to 7th path clans fighting over gold because they think they can trade it to us for us to give them superweapons (which isn't even particularly inaccurate).