Even when airlines don't sell all of their first - class seats on a given flight, it might not be easy to use miles for an upgrade. (businessinsider.com)
It is also extremely easy to use for the purpose of buying and selling of Bitcoins in small volumes. (coinscage.com)
However, if you do sell some of your items, you would be collecting the bells next time you return to your village. (mypotatogames.com)