public String getCurrencyString() {
        Iterator<BankAccount> it = accountsList.iterator();
        StringBuilder builder = new StringBuilder();
        if(it.hasNext()){
            String currency = it.next().getCurrency();
            builder.append(currency != null ? currency : "");
        }
        while(it.hasNext()){
            String currency = it.next().getCurrency();
            builder.append(" | ").append(currency!=null?currency:"");
        }
        return builder.toString();
    }