Maybe..
2019(SF4) - United States (many Steemians are here!)
2020(SF5) - Japan (Tokyo Olympics matters!)
2021(SF6) - S.Korea (Expecting BTC mooning)
Flight won't be a big problem,
Cost won't be a problem, neither (by 2021 Nov ;))
Eg) Europe to Asia .. flight ticket mostly cost app. $1k. (more or less)
Just my 2satoshis..✌