Method, system, and computer program product for executing cryptocurrency transactions. A request to execute a transaction related to a first cryptocurrency token is received by a secure ledger network. The secure ledger network executes a smart contract validated thereby and determining at least one rule for performing the transaction. Execution of the transaction comprising determining a price of the first cryptocurrency token and/or an amount of at least one of the first cryptocurrency token and another cryptocurrency token obtained in exchange of one another, based on a group of parameters comprising: a total amount (Tt) of the first cryptocurrency token in circulation, a total reserve (Tr) of the other cryptocurrency token in a reserve, and a reserve ratio constant (Rr) predefined as a ratio between the total reserve and a token market cap. A secure ledger maintained by the secure ledger network is updated about completion of the transaction.