Economic research has identified a trend exhibited by one in six Britons of hiding cash in their homes instead of investing it$.$ This is termed the "Biscuit Tin Economy." It is estimated that $$3\mathrm{.}5$ billion is currently hidden in homes across the country. While there are various reasons for hiding cash, $6\%$ are doing so to conceal it from their partners and $4\%$ believe their money to be safer at home than in a bank. Researchers maintain that these actions demonstrate economic folly, and that, as a result, Britons are sacrificing up the $$174$ million in interest every year. This "Biscuit Tin Economy" is betraying those who trust in it$,$ as it renders their hidden money both unproductive and potentially unsafe, whereas it could be profitably invested in stocks or a high$-$interest savings plan.