they will have to jump onboard at some stage as there are other threats to income base evolving as well.
They will eventually lose future income as more countries advance their 3d printing and robotics tech which will put a lot of factories in china out of business.
If they decide to shun cryptos/blockchain then it gives other countries a chance to advance at a quicker pace. They can try and restrict citizens all they want....theres always a way to get money out of china....students studying abroad being the popular channel..