A very interesting and beautiful topic. When I look at the list, I think the city that will suit me best is London. It hosted many conferences that I followed closely. After that, I can say that it would be a city from America.
Why can London be an American city while London is in the European part? I think that the problem with more events in the London area is because
London has cool air temperatures that tend to be cold, ranging from 11 to 15 degrees Celsius. Let alone Asian tourists, residents of London were reluctant to linger outside when the wind began to blow hard.
So London is more suitable to be the blockchain capital because it is easier to reach by everyone in other parts of the continent and also with a fairly dense population there.
So that it can be easier to hold any event related to blockchain because there are also more people who know about blockchain.