#1
There's an upcoming new coin called PI network. No value yet as it is in their 2nd phase. They say it will be like bitcoin but there is not promised value yet from the creators. Although the idea is promising, just like what monero did, users were freely to mine.

Show ContentSpoiler:
As the PI network hits the main net it will be available for everyone to buy, sell, and trade the coin. On my observation, this coin have potential to become one of the main cryptocurrencies today. What's great about is it you can mine on your phone. You can leave it overnight and click mine again after your mining session. 

Just download on your appstore/google play "Pi Network" and sign up under my referral or not it's up to you but signing me up on your referral gets you certain % on your mining. My referral is Sinuy