I still have no idea of how this fee system works in bitcoin. Sometimes minimum transaction fee is 1.1 usd while at times its 0.5 usd. It's very complex, will be happy if somebody can teach me this in simple words.
Check out this video :
Bitcoin Fees Explained, short video explaining the fees, if you like to know more, there's a lot of related videos you can find in youtube, it's just too basic, everyone has to know about it.
disclaimer : video is not mind nor endorsing it for personal interest.