Do you think laypeople understand this? I don't.
There's been a lot of conflation among "digital currencies", "virtual currencies" and "cryptocurrencies." Most dumbed-down explanations and media coverage emphasize the intangible and virtual nature of coins and their lack of backing, rather than conveying why the technology works and why it has economic value.
I agree with that. But I also think most people are plebs who don't know what decentralization is or why a deflationary supply matters.
To address the OP: States will issue digital currencies to take the luster away from real cryptocurrencies. They'll exploit ignorance about the technology to get people to ignore decentralized coins. To some extent, they will succeed, but there's no way they can actually stop the Bitcoin train. Legit cryptocurrencies will continue to flourish.