Bitcoin started at $1 before so no need to worry except if you bought it at $3000 each. I suggest do not sell your bitcoin for now because even i will purchase bitcoin if it reach at below $3000 or cheaper to re invest it again atlest at the lowest capital. Then experience to gain it at the highest value again if China is failed to manipulate bitcoin completely. Thats how trading works.
Banning of bitcoin from foreign money changer in china could probably affect today's price and bring it to bigger dump. But isn't meant that it could make bitcoin will gone. I believe bitcoin price will pump when that issues resolved.