8% of people used it at least one time in an entire year.

In a place where people (who have on average very low incomes) were given $30 worth of bitcoin by their government just for signing up to a wallet app, so a very, very large proportion of the populous (compared to any other country on Earth) already had an app and wallet set up and ready to go. That's not a lot. That's a clear indication that the experiment simply didn't work.