You can trust the Chinese in China to continue buying up the coins and driving up demand.
By and large it is the Chinese control much of cryptocurrency market. So that China and China alone.
I think the Chinese control the making of the cryptocurrency, the bitcoin and the Ethereum as they are the miners.
The only thing that they control is the distribution of Bitcoin among the markets, and it means very little when it comes to actually controlling it. There are plenty of other miners that also find blocks and sell Bitcoin that aren't Chinese, so it means very, very little. Making Bitcoin means nothing to be completely honest, because most people will just go and buy it from an exchange.
It doesn't matter if the Chinese are big miners or not. Bitcoin is produced on a set schedule, if it wasn't for large Chinese farms, the same number of bitcoins would still be produced. Likewise, the number of Chinese miners could double and the same number of bitcoins would be produced as now. It's not like gold where the more miners there are the more is produced. Production is mathematically set and limited.
That is right. It does not matter who the miners are, as long as they behave like a miner to secure the network, it is not a problem.