Any financial sector has whales who manipulate the market to suit their desires. Bitcoin and cryptocurrency is a decentralized sector, and as such is not under the regulation of any body or system.
The actual trading is overwhelmingly centralised and carried out on owned platforms. It doesn't matter what the underlying thing being traded is. I find it very murky as to what actual laws apply here. They're not stock markets, but gold was created several billion years ago out of stardust. People get prosecuted for messing with the trade of bits of pig or orange juice. None of them are centralised in any way but how they're traded can be actionable.