I think no one can destroy bitcoin any more.Because bitcoin is a online currency and It's not controll by any parson or any country .If any country want to bann bitcoin in there country,they don't stop it any more.People will find the new way to use bitcoin.If goverment stop there internet also,that's way they don't do it.So i think china can,t destroy it .Bitcoin will more increable day by day in the world,thank you.