It looks to me like there will be a replacement as the development progress has slowed to a crawl. Not to mention Diffie-Hellman elliptic Curve25519 is considered not safe.
I no longer trust the constants. I believe the NSA has manipulated them through their relationships with industry
Bruce Schneier
Should I continue?
This is exactly backwards. Schneier was referring to the constants of the NIST curves. Curve25519 is
not a NIST curve, which is precisely why it's been very popular among cryptographers in recent years.
From what I understand it has to do with the selection of common constants but I'm not going to research it again.
Popularity
Curve25519 was first released by Daniel J. Bernstein in 2005,[7] but interest increased considerably after 2013 when it was discovered that the NSA had implemented a backdoor into Dual EC DRBG. While not directly related,[8] suspicious aspects of the NIST's P curve constants[9] led to concerns[10] that the NSA had chosen values that gave them an advantage in factoring[11] public keys.[12]
I no longer trust the constants. I believe the NSA has manipulated them through their relationships with industry
Bruce Schneier, The NSA Is Breaking Most Encryption on the Internet (2013)
Since then, Curve25519 has become the de facto alternative to P-256, and is used in a wide variety of applications.[13] In 2014 OpenSSH[14] defaults to Curve25519-based ECDH.
https://en.wikipedia.org/wiki/Curve25519