How I ended up writing about alpacas is explained here

It's due to the connection made between them and Bitcoin.

So how did this less-than-obvious pairing begin? The Grass Hill Alpacas farm in Haydenville, Massachusetts is owned by Jim and Nancy Forster. It was their son, David Forster, who convinced them to accept bitcoins. Forster, who calls himself a “self-taught economist,” claims the distinction of being the first merchant to sell a product for bitcoins. 
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Alpacas: the unofficial mascot of bitcoin?