IF the whole world ban BTC at first BTC will Crash very hard but only for a few month, Demand will be increased while there will be no Legal Seller, All trade will go to undergrand and Black market and illegal traffic, sellers will start to selling BTC 50 X more than current price. BTC will be more expensive, As simple as that,
That was an answer for these who said BTC will die if whole world Ban it, So no BTC never Die.
I guess if whole world bans bitcoin then it will get harder to mine it so transaction fees will skyrocket and make almost impossible to send payment.
What about bitcoin that worths 1$-1$? I mean stablecoin with great anonimity and low transaction fees? Won't it ruin your whole idea behind the prediction of bitcoin's price if every country bans it?
Also if bitcoin crashes hardly in any case, doesn't matter reason, it will be very hard to gain powers back, so it's not something I would ever wish.