Take up the hobby of metal detecting. You'll find them.I used to collect silver coins. Not too many to be had any longer. I did find a silver quarter about 5 years ago in my change. Back in the early 1970s it was far more frequent. Found a silver dime a couple of years ago too. I gave them, along with my Morgan silver dollars to my daughter.
Someone did that to me years ago - the joke did not work. Unknown to him is the detector indicated depth of target along with type. All of his placed pennies were an inch or so and ignored. Now high end detectors have become very sophisticated machines.I knew a guy who did that back in 1981. We used to drop pennies for him to find.........it was hilarious.
That is some beefy Nb-Ti cabling... I visited CERN in 2013, and they had some bits of the Nb-Ti superconductors on the LHC ring to show us on the tour - a thin cable of Nb-Ti about the diameter of a pencil was rated for 13,500A of current when cooled. Equivalent copper bundle had a diameter of ~100mm and weighed an absolute ton.
You'd want to turn down the OD of that so you exposed the Nb-Ti right? Otherwise you might as well just use copper round bar stock
It definitely has a beautiful look to it when machined, too bad it's so damn expensive!
If I were to make a host from this material, it would be for it's looks and not for any possible thermal improvement over plain copper.