Be careful with only using 160 bits of entropy for private keys. The strength of ECDSA keys when the public key is known is half the key size. For full length key 256 bits length = 128 bits strength. So 160 bits mean 80 bit of strength. This is not beyond brute force. It may not be economical but brute forcing the private key from the public key is feasible.
This is often repeated around here, but are there any documented, non-theoretical examples of that? Not talking about in 10 years, but today? Not trolling. Do you have any sources for that claim?