Talk about it, I spent about a week not visiting the app and when I came back I had 0 coins. I was asking myself the same question and researching and I think I've got the answer. It because you spend some time without answering any questions. You earn coins by answering so I guess you lose by not answering because if you look at the coins in your profile, they are a different number from the ones on the leader board.
Disappearing Model was created in 2000.
Today, middle management is disappearing.
The duration of Disappearing In America is 1.47 hours.
The Disappearing Floor has 192 pages.
The Disappearing Dwarf has 275 pages.
The Disappearing Dwarf was created in 1983-02.
The Mystery of the Disappearing Cat was created in 1944.
Disappearing Acts was created on 2000-12-09.
Disappearing London ended on 2007-02-13.
Disappearing London was created on 2006-01-10.
The Disappearing Floor was created on 1940-05-01.
The happening started off with bees disappearing