If the hoard exists, that will be huge bonus, if only for tourism, to the country that is found in. I would make a point of going to see a museum that had this stuff stored in it.
Last April, Mrs. abb & I went to Key West to fulfill a bucket list item - The Atocha Treasure at the Mel Fisher Museum. Worth the trip, imo.
Finland.
I've been to Finaland. I can tell you, without any irony, deceit or duplicity, that Finaland is perhaps, the most boring country in the world. I spent at least 3 months there one day. It's in a time warp of boring and uninspiring where, their most interesting thing they have is a sculpture...that any 8th grade welder could make, and probably has.
No, no amount of treasure will increase tourism in Finland because there is nothing there worth seeing, even if they find treasure.