No, no, no no, no!
The conclusion the article makes doesn't stand up to even a modicum of scrutiny.
He had materials from as far away as 45miles, and therefore they concluded that he traveled up to 45 miles to get them? Really?
You don't think some enterprising neolithic man figured out he could travel and trade from one community to another? That's a profession that has been around since the dawn of man. Who is to say that he didn't pick up the stones in one community, travel 45 miles and then trade a stone to Otzi for a pound of Ibex jerky, or bitcoins or whatever.
Moreover, in one paragraph the article even says that
This supports previous evidence suggesting that alpine Copper Age communities maintained long-distance relationships, scientists say.
So it stands to reason that traders could meet in the middle, therefore the trek is only 22.5miles for each party, or that they could simply trade with one another where sometimes you come to my village, and sometimes I go to yours. Either way, there's nothing that says that Otzi did any of that. Merely that he had the products from villages as far as 45 miles. But if Neolithic Dave knows his buddy, Neolithic Sam came from the oogabooga village 45 miles away, and brought some really good pieces of flint, you don't imagine he's going to invite over his buddy Otzi for pizza and hook him up with a good stone?
You see what I mean? Having the material doesn't indicate, and cannot for one nanosecond, be taken to indicate that Ozti did any of that traveling himself.
You know some day in the year 6,000, some archeologist is gonna find my mummified self on the sofa in my house, and read the tag that says "made in China." Next thing you know the headline will be "ancient guy traveled from Connecticut to China to get a sofa."