Bitcoin was trading above $28,000 on Monday, as cryptocurrencies extended a bull run to start the week. This upwards sentiment comes as the Federal Reserve and other major central banks made coordinated moves to enhance market liquidity. Ethereum continues to trade close to $1,800.Bitcoin (BTC) started the week trading above $28,000, as markets responded to the deepening global banking crisis.The coordinated action by several major G7 central banks comes as Credit Suisse was bought out by rival UBS, a move engineered by Swiss authorities.BTC/USD jumped to an intraday peak of $28,527.72 earlier today, which comes a day after trading at a low of $27,196.76.