Bitcoin is the best coin that I have ever invested in and is currently self-sustaining. Because I mean in the past there were usually investments with bitcoins, but a lot of bitcoins got destroyed. But Bitcoin is improving now. So you come back to Bitcoin with this realization like I did. I got the idea of ​​Bitcoin investment when I came across cryptocurrency forums. And from that day I started to invest without Bitcoin. And at present I am independent but in the past I lived a miserable life.  Hence the main source of success in Bitcoin.