BITCOIN can survive without china, WE can survive without china. 20% of bitcoin is on china? YES, but if china banned bitcoin, i think 20% of bitcoin will spread into another country and another people in the world, we can see bitcoin demand in the world is higher thank bitcoin stock. we can for a week or 2 week bitcoin price will go up like normally 
OK but we will just go back to the 1 year bear market again. It's not really that favorable unless you are shorting.