It is just a few dollars over 1000 dollars, so I don't think we say goodbye to 3 figure price, actually there are something I am worrying, I worry about Chinese central bank bans bitcoin in one day, or shut down the exchanges, but I don't think it is possible. They can't prevent the freedom currency-bitcoin.
I think your concerns are somewhat unfounded, and let me tell you why, as you know the banks do not control BTC, however, since cash transactions are controlled by them when making cash conversions to BTC or viceversa and if for some situation they decide to ban would provoke some panic sales causing a drop in prices which would then be offset by purchase orders from other countries, on the other hand if exchanges stop working which seems unlikely would give rise to descentralized exchanges, if at some point many places begin to accept BTC as a means of payment conversion to cash would no longer be necessary probably. So more than the banks or exchanges, the opinion of most people in the world is of greater weight ,and, where appropriate, governments.