euro usd is most comfortable trading pair particularly when using scalping. but scalping not works for a long time, its all about short time approach
Favourite Pairs are: Eur USD and BTC EUR for me. High volume, lots of traders in there, that is the cake, I want a slice of!
I'm fond of recent volatility on Gold, I think 2020 is a year of Gold because these up and downs make it possible to earn even with the use of low leverage.
For myself, I also identified several currency pairs that are very popular and it is much easier to work with them.
when i can predict the real faction of this market with certainly then i can make profit by using any kind of trading pair .