They forbid interest, not Bitcoin if you read from the news you included, but people will always assume that Bitcoin is haram, and are quite curious about how a means of payment is considered something that is haram because that means fiat or other online payments should also be haram.
I suspect it's because they don't get the right information about Bitcoin as many people say Bitcoin is a scam because it is associated with online businesses or is like a HYIP.
Actually, in Islam itself, the view on this is not the same because there are also those who consider it not haram.
However, if you think that by spreading news like that, Muslims who have Bitcoin will sell it and make a profit because the price will fall so that we can buy it at a cheap price, it doesn't really work like that, because just like in Islam, gambling is haram but there are still lots of Muslims who gamble will only have some who obey what religious leaders say and there will be more who don't care about it because they think it is not in the Muslim holy book.