Anyone predicting any price is a clown. You can say that there is mathematically good chances that Bitcoin will be worth more in the future but don't throw random number and timeline, whatever justification you give to it, that's just guess and all people doing that will be wrong eventually.
I think it's a good way to secure it for sure, and I did this in the past for some reason. But if you use Core Lightning with rune and restrict the daily/weekly amount, you should also be able to secure it properly. Thus it might be more complicated to quickly revoke the rune in an emergency, unless it can be automated with a single remote command or something easy in a similar way.
It looks more like Google Drive Doc or any other online office like Nextcloud Office, Synology Office, Collabora... Far from MS Office software suite but it might be enough for most user for sure and with Claude integrated it could be a killer feature vs paying the full office 365+copilot Premium
It's a nice demo, but there is no point if the main Signal app is not adopting it, people will not migrate just for that. Also it would need more gamification to buzz and get used for real.