I agree, China have a big impact in cryptocurrency especially in mining bitcoin. As you noticed, in simply releasing news about cryptocurrency the market immediately crashes the whole market. I might consider that they can manipulate the crypto market. India have big influence in cryptocurrency. I noticed large of people living their know about cryptocurrency. These two countries are very aggressive and have sympathy what cryptocurrency doing in the world.
Being an Indian, I would say that you guys are overestimating the influence from India. There are large number of users here, but overall volumes are not high. Also, the mining sector is almost inexistent (due to the high taxes, high cost of the hardware and expensive electricity). On top of that, the local exchanges and businesses face a lot of harassment from the authorities, due to lack of clarity on the legal status of Bitcoin. However, China accounts for 70% of Bitcoin mining hash power, and for a large share of the daily volumes.