Raiblock (XRB) A.K.A NANO.
From this alt-coin, I finally know more about Cryptocurrency. It's super easy and free for mining this coin on the olds day, you just need to solved captcha for the coin. Finally this coin making the big success by listing on Binance.
It's crazy.
That coin is crazy in early of 2018 when it was Raidblock. $28 for that shit token that was rewarded by solving captcha in 2017.
In the 2021 bull run, it recovered to over $10 but now again it is traded under $1. The token is crazy as it has changed the name two times from Raidblock to NANO, the token ticker changed three times from XRB to NANO and now XNO.
https://coinmarketcap.com/currencies/nano/