Why would btc be against koran? I doubt it is.
Koran and Old Testament have so-called usury laws, any interest is illegal.
The reason.
Say your community has 100 people and each person has 1 dollar. As soon as 'interest' enters into the equation, the system breaks.
If a 'bank' got say 20% of the currency and loaned it out, that's 20 bucks at what interest?
If it's 10% that's 22 bucks have to be paid back, so now the community needs 102 dollars and only 100 exist.
That's the basic reason for usury laws, the concept was you can't created something from nothing, it spurs 'inflation'.
Modern economics just creates more and more fiat, to cover the 'interest deficits' any usury system creates.
It's why milk was 50 cents a gallon in early 1970's and now it's 5 bucks.
Usury economies create inflation and that's why you had Biblical and Koranic laws against it.
If anything btc is anti-inflation, since the total bitcoins allowed is capped at 20M or so.
So goods and services become less in value of the btc it takes to buy it, that's why the value of btc goes up as more users join the btc system.
BTC is deflationary as to price of goods/services and usury fiat promotes inflation, I would think Imma's and Rabbi's would be pro-btc.
That's not why those religion bans usury.Usury means giving high interest rates for debt and is seen as unfairly taken advantage of the needy.When you seek to borrow money it usually means that you're in dire need of those.Belief system that promotes selflessness frowns upon this practice thus some of them(Islam e.g) seek to stop this by banning interest on debt altogether( although the loanee is encouraged to pay more than what he borrows about of his own accord and not because the loaner demands it,as a token of gratitude ).
The thing ,is none of those religion bans paying dividend on investment and that is how Islamic bonds and loans(yes, those does exist in Islamic Finance) work.There are multiple mechanism used (that are still debated by Muslim scholars) but the underlining theme is you can't charge fixed interest, any dividend given must bes based on the performance of the investment(the rate is usually determine at the end of financial year) and must be fair a not burden the loanee/business owner.
