No one steps into the same river twice. All things are subject to change and in constant flow. But it makes a very big difference which river you step into - the gently flowing Main-river, for example, or the headwaters of the Rhine-river.
As far as the financial markets are concerned, there is much to indicate that we are caught up in a raging mountain river which is digging a new bed after heavy thundery rain. During the past few years, individuals, enterprises, markets, institutions and governments have been up against a raging current of change in the conditions under which they operate.