Current cryptographic algorithms will be broken within the next couple of years. The time to migrate to post-quantum cryptography is right now. Ah yes ... and while you're at it, don't forget about crypto currency.
Migration steps towards post-quantum cryptography:
- Identify possible technologies
- Choose algorithms for standardization
- Standardization (RFCs)
- Integration into operating systems
Right now, we are at step 1 and 2.
OpenSSH 8.0 supports quantum-computing resistent key exchange method - still experimental though.