I don't think those economies will collapse. There will be some recession but not a collapse. Safe haven currency and treasuries will be the best things to store your money in, I believe.
There is nothing wrong in having a belief but we have seen global recession in the past and how the so called save heavens collapsed in the past, so you cannot completely neglect the fact that even the strongest economies right now could collapse, if you take the US economy the debt is increasing at an alarming rate, so basically there is no safe heaven and safe bonds that we could trust entirely, but one thing you cannot predict is the exact time about a recession and if predicting that is so easy, people would have taken precautions in the past and we all know what happened.