There's never a crisis until the crisis actually hits.

Nowadays, it's not only "China" but "anything". You should always question if the author has a political agenda to push.

OTOH I've read for years about the impeding housing bubble bursting or that the rally of the stock market has to end in a crash soon.

You can be fundamentally right but still be wrong for years to come.

That works both ways, just look at some of the commenters on this page and their history to see the other side at work.