So far Pi Network, Timestope & Bee Network are the top 3 mining networks in 2021 which are completely free to mine. Only five seconds a day on your smartphone and no investment needed, you have a chance to receive a huge amount of money as in the future these will be worth thousands. You need a invitation code to join at start. This is how many made millions through Bitcoin for free when it started! For Pi Network use invitation code: sbegum43 For Timestope use witness code: sbegum43 For BEE Network use the invitation code: sbegum43 I'm always mining and active. Happy Mining :-)