Everybody is starting to use encryption right now. That's because governments everywhere were caught spying on people, so modern software is written with a "encrypt by default" mindset.

This movement was triggered by spying. But it is also because encryption is mostly free nowadays, while a couple of decades ago it was almost too expensive to use anywhere. Thus you can also view the causality starting with technology improvement, and that all the encryption demand was there, latent, with the spying only perturbing things a little and unleashing a chain reaction.