Well! just one thing is certain about the crypto world and that is uncertainty itself. It hurts when you make a trade for cheap just to realize later that you could have made so much from that same trade than what you made.

but looks like I'm a too bad investor to make life-changing money.

About this, I can say if you were a bad investor or not but here is my take on that. If the situation that led to you trading your DOGE was for a noble purpose then you made no mistake and you're not a bad investor but if you made the trade for the fear of value drop, then you were not futuristic in that.

I attended a financial summit somewhere and for the first time I heard about the term "financial emotion".

I think if you knew better, you wouldn't have traded your DOGE then that's why we at all times should learn to go for knowledge.

Sorry about this sir