Conventional banks are prohibited in Islam because of the interest system applied by both the borrower and the lender. This concept is also almost the same as that applied by some crypto platforms to store Ethereum and earn a certain percentage of interest every year. Automatically the concept of staking is the same as the concept of conventional banks.
The basis of bank interest is haram because the interest is set unilaterally, namely by the lender or the borrower.
Of course, the law is fair, if conventional banks are haram based on certain studies, then the staking system is also haram.
To avoid haram against bank interest is very easy. What must be applied is the initial agreement by both parties.
For example, a consumer borrows money from a bank, then the bank asks the consumer. The bank will give money to the consumer, the consumer must give 10% profit to the bank, can the consumer be able to?
Then the consumer said it was too high, what if 5%?
The bank said it was too low, what if it was 7%?
Then the consumer party answered agree.
After agreeing to both parties then a letter of agreement was made with the result of an agreement of 7%.
Indeed, this method looks difficult, but lenders and loan recipients both feel safe and comfortable with the results of the agreements they make.