VK has no control over the keys. You generate them inside of you and they stay there, if that’s not your possession idk what is.
This is true, but there’s a solution. If VK prepared everything on their end and then spends a LOT on marketing, it has a chance to catch on.
If VK is attractive on its own, without transit and banks, and enough people get one, companies will follow. VK alone probably has a good chance in the yubikey market which is growing daily, even if only because people need 2FA for work.
Ofc though payment & transit will be the killer app.
But VK isn’t alone. Fidesmo is trying to merge all cards into one which can reduce costs for companies, so we have a good chance imo.