In 2009 something happened that had never been done before in the history of computer malware. A digital weapon was released with the express purpose of attacking specific machines and causing them to fail, sometimes spectacularly.
RC4 is a stream cipher and variable length key algorithm, and it was once the go-to cipher suite for web encryption. Then someone figured out how to break it.
Some people think shopping online means retail stores will become a thing of the past. I have a dissenting opinion.