Bitcoins and money.
Prior to Alaska statehood, there is a dearth of coins. BIG transactions were on paper but the nickel-and-dime transactions were difficult on stores’ books. So Alaskan businesses coined their own money. Called “bingles,” they were widely accepted. Until Alaska became a state and then these coins were called counterfeit.
[See my books at https://authormasterminds.com/steve-levi.]
Steve Levi is an Alaskan writer who specializes in the Alaska Gold Rush (nonfiction) and the ‘impossible crime,’ (fiction.) An ‘impossible crime’ is one where the detective must figure out HOW the crime was committed before going after the perpetrators – like a Greyhound bus with bank robbers and hostages disappearing off the Golden Gate Bridge –THE MATTER OF THE VANISHING GREYHOUND. Steve’s books can be found at www.authormasterminds.com/steve-levi
