1) CREATION OF BITCOIN = halal because it's not created out of nothing like paper money/fiat/country's national currency but rather uses energy. Which energy? 1) Electricity/wind/solar etc to run bitcoin mining machine 2) Human energy that become node operators that run their own server on their own pc. All in the name of solving a 10 minutes encrypted mathematical puzzle and strengthening the credibility of the bitcoin network. In other words...there's actual work and effort that needs to be applied to the creation of bitcoin.
2) CREATION OF PAPER MONEY/FIAT/COUNTRY'S NATIONAL CURRENCY = haram because it uses the method of printing or creating new supply of money out of thin air and then putting it into circulation to cater new demand from the public in terms of loans applied by users mainly from financial institutions that gives birth to usury/riba which is haram in Islam = interest.
3) NONETHELESS...trading of bitcoin in the online trading platform is HARAM because there's an element of mistreatment/unjust/opression that gives the upperhand to one party whilst misery to the other in terms of bitcoin's value. Why? Because trading activity in such marketplace mostly are neither genuine nor authentic. It's manipulated by market makers. Same thing with the trading of metal either gold,silver etc/stock/etf/future/bond/option etc and other high risk category type of investment where the value of each investment product is determined by whoever has the power to moved the market. If one really insist of buying or selling bitcoin online...P2P (individual with another individual) is the way to go with cautious in mind of course and don't try to play the ' the guessing-game ' in terms of its value's movement ( margin/leverage/future ) for that actually falls under the category of gambling. Just stick to ' spot ' because ones intention was never about gambling/harming/ opressing other people. We just wanna buy it...keep it + holding it and sell it for profit when the right time comes.