ANgularjs: ng-repeat and nested custom directive

I am trying to ng-repeat a custom directive, which has an attribute that should change over the iteration.

This is my html:

<div ng-controller="WalletsController as controller">
    <bitcoin-address ng-repeat="bitcoin_label in controller.getWallets()"  bitcoin-label="bitcoin_label"></bitcoin-address>
</div>

This is my controller:

(function() {
var app = angular.module('wallets', [ ]);

app.controller(
        "WalletsController",
        function($scope, $http) {
            this.wallets = [];

            var controller = this;

            this.getWallets = function() {
                return controller.wallets;
            };

            $http.get("wallet_addresses").success(
                    function(data) {
                        for (var i = 0; i < data.length; i++) {
                            var curWallet = data[i];
                            $scope[curWallet.label] = {
                                label: curWallet.label,
                                address: curWallet.address,
                                balance: curWallet.balance
                            };
                            controller.wallets.push(curWallet.label);
                        }
                    }
            );
        });

app.directive(
        'bitcoinAddress',
        function() {
            return {
                restrict: 'E',
                templateUrl: '../../resources/html/bitcoin-address.html',
                scope: {
                    bitcoinLabel: '=',
                }
            };
        }
);
})();

And this is my template:

<div class="col-md-8 dashboardAddressCell dropdown-toggle" data-toggle="dropdown">{{bitcoinLabel.address}}</div>

What happens is that the template can not resolve the bitcoinLabel variable. I have tried specifying a constant value and the template works. My conclusion is that I am not correctly specifying the bitcoin_label attribute in the html section.I have also tried using {{bitcoin_address}}, but angularjs complains about that.

I have also tried with the following html code:

<div ng-controller="WalletsController as controller">
        <!-- <tr><th>Indirizzo</th><th>Saldo</th><th></th>-->
        <div ng-repeat="bitcoin_label in controller.getWallets()">
            {{bitcoin_label}}
            <bitcoin-address bitcoin-label="bitcoin_label"></bitcoin-address>
        </div> 
        <bitcoin-address  bitcoin-label="ciccio"></bitcoin-address>
    </div>

It does not work either, but at least it shows the {{bitcoin_label}} value.