{
    "_id": "5aa9535c6c4f437de713452a",
     ...
    "ht_score": "[0-1]",
    "ft_score": "[1-3]",
    "et_score": null,
    "penalty_local": null,
    "penalty_visitor": null,
    "comp_name": "UEFA Champions League",
    "predictions": [
        {
            "name": "Ilker Baltaci",
            "userid": "*******",
            "userFbid": "*****",
            "local_team_score": "3",
            "away_team_score": "1",
            "status": "FT"
        },
        {
            "name": "M. Mustermann",
            "userid": "*******",
            "userFbid": "*****",
            "status": "FT"
        }
    ],
    "match_id": "2324756"
}

var bulk = db.collection('bets').initializeUnorderedBulkOp();

return new Promise(function (resolve, reject) {
        try {
            predictions.forEach(function (currentPrediction) {
                //Find one and update
                let match = games[currentPrediction.match_id];
                const query = {'_id': new ObjectID(currentPrediction._id)};
                bulk.find(query).update(
                    {
                        $set: {
                            status: match.status,
                            timer: match.timer,
                            localteam_score: match.localteam_score,
                            visitorteam_score: match.visitorteam_score,
                            ht_score: match.ht_score,
                            ft_score: match.ft_score,
                            et_score: match.et_score,
                            penalty_local: match.penalty_local,
                            penalty_visitor: match.penalty_visitor,
                            "predictions.$[].status" : "FT"
                        }
                    },{ multi: true });
            })

            bulk.execute(function (err) {
                resolve(predictions)
            });
        }
        catch
            (e) {
            reject(e);
        }
    }