In general, Islam does not recognize any currency that is not covered by gold, silver, and other assets.
Based on the above definition, all current currencies are not considered as money according to Islamic Sharia.
Muslim scholars in the current era added an exception to the currencies not covered by gold provided that there is a hand issued and guaranteed value such as the Central Bank.
Therefore, most Muslim scholars do not recognize bitcoin but may change in the future.
Correct. They don't mind online businesses as well. It depends upon the country actually. However, Bitcoin is not related to any religions all over the world. We have different thoughts and beliefs. And according to our experts, in the near future, money would be spent online and there would be no physical money that we can use.