What is the precise explanation of the issue of bank interest, bearing in mind that banks which do not charge interest are doomed to bankruptcy?

The deposit in a usurious bank is a guaranteed loan with an agreed-upon increase, and every increase stipulated in a loan contract is unanimously considered forbidden interest (riba). Islamic banks demonstrate the possibility of banking operations without interest, as they are based on permissible transactions such as Mudarabah (profit-sharing), Murabahah (cost-plus financing), and Istisna' (manufacturing contract). Allah does not forbid anything without which life would be impossible.