One reason why bitcoin may fluctuate against the fiat currencies is the perceived store of value versus the fiat currency. Bitcoin has properties that make it similar to gold. It is governed by a design decision by the developers of the core technology to limit its production to a fixed amount.
Nope I dont think there are some people that control the flow of price except the market itself and there are no properties that bitcoin is similar to gold so bitcoin doesnt correspond to gold in other aspect to. It is too much contrast between gold and bitcoin. The is one thing that only bitcoin can win against everything, that is their technology other else is nothing