Would bitcoins cease to function if the internet were destroyed.
I would just like to say that if the internet was destroyed,
more than just Bitcoin/bitcoin would cease to function.
Sadly, many people rely on the internet for almost all daily purposes now, including:
Knowledge ("googling"),
Banking ("paychecks & bills")
Relationships ("facebook,dating,family,friends,etc")
Purchases ("amazon,etc")
Communications ("skype,online phone,etc")
If the internet went "down", then a decent percentage of the modern world goes "down".