Long term yes because of its brute force ability esp. With original addresses before they moved to the not public keys encryption (I forget what its called the new one ends with an H).

While quantum is undergoing a lot of experimenting and testing at the same time so is quantum proofing agothims and computing. The National Science Foundation (NSF) has been working on this for years because first and foremost the banking system is at risk and is the bugger target but BTC isn't going to be to far behind