First of all bitcoin is based on blockchain technology which means it is a decentralized ledger that is public. Therefore, there is no central authority that can control bitcoin and it is not controlled by any country government. The rise and fall of bitcoin prices depends on investors. The price of bitcoin is determined by how much sellers are willing to sell it for as little as possible. In addition, the price at which the market is ready to buy and sell bitcoin is determined by the public's attitude towards it. So market behavior is determined by technical fundamental analysis and price patterns, charts, and expectations of good bullish and bad bearish events with large price swings, dumps, pumps, large volume sales, wall buying, wall selling etc.