i think that there's a correlation between wealth and ease of migration, Berlin for example is attractive for those with a low/mid budget (wealth) and some countries are better suited for wealthier migrants (singapore, NYC, monaco). the marginal benefit of wealthier migrates from places like Berlin is nothing compared to locations better suited for their life style. all and all, i'd say if youre tight no budget go to Berlin, if not, there are specific destinations for you.