NEM財団の表明：https://cryptonews.com/news/coincheck-hacked-more-than-500-million-xem-stolen-1093.htm

As far as NEM is concerned, tech is intact.
We are not forking.
Also, we would advise all exchanges to make use of our multi-signature smart contract
which is among the best in the landscape.
Coincheck didn't use them and that's why they could have been hacked

要約：
NEM自体に問題はありません。　CoinCheckのセキュリティがガバガバすぎる事が問題です。
盗んだアカウントの金の流れを追う事への捜査協力くらいはしてあげてもいいですよ。
ハードフォークはする予定はありません。(お前らのセキュリティがガバガバなせいだろうが)