I don't know much about him but I think he is the creator of that famous antivirus with his name. I have seen his crypto related posts many times but I have taken it lightly all the times and also I don't see his much contribution in the crypto field.
Honestly l don't use any app, more than that l spend most of my time here. There are a lot of ways to learn something, But for me the best way is making research on google or watching some videos on YouTube.
But I know I sold them all for $ 7 and the next day it went up in value and I made it 30% a question of personal ignorance. My experience was too bad I couldn't remember exactly how much Dogecoin did to a certain extent