So you're telling me that if each Bitcoin is worth $1 million dollars ransomware or other sophisticated malware and spyware wont be developed to target Bitcoin users? This isn't paranoia it's common sense. Governments may or may not have hit any of us already with advanced persistent threats. Do you think they'll tell us?
You're a persistent one.
I'm just telling you that ransomware will not magically become more efficient than it is now just because people acknowledge bitcoin being worth more than murrikan dollar.
Ransomware today is a pain. Ransomware tomorrow will be a pain. Ransomware won't be more dangerous tomorrow than it is today.
Your coins are safe as long as you have a backup+strong passphrase or cold wallets.
Just smile and go to sleep.
The answer to ransomware is tightening security and switching to opensource software, not fucking with Bitoin.