For me nothing was the curiosity that was only need of the money , I searched the strange way of the earning but didn't found anything but a person of the thialand wrote the comment in the earnings site "I made earning 10$ in one week  through bitcoin " , that phrase attracts me for the bitcoin and from that day I started to learn and study the bitcoin and After 4 months I got success that how to use it for the earning .
Since that was time for the bitcoin and few dogecoin and altcoins but in the current time lots of altcoins are available to make trading ( around 600+ altcoins are available in the cryptocurrency market ) .
So this is only my greediness  of the earning that is making me to earn more and more without any limitations