The hottest current example is one that Democrats used for a confidence boost in 2004 as well: cellphones.
“Fear was widespread and confidence was scarce,” he explained.
The firm was above responding to criticism because there was nothing that could shake its clients' confidence in its abilities.
early 15c., from Middle French confidence or directly from Latin confidentia, from confidentem (nominative confidens) "firmly trusting, bold," present participle of confidere "to have full trust or reliance," from com-, intensive prefix (see com-), + fidere "to trust" (see faith). For sense of "swindle" see con (adj.).