What is the economically safe thing to do before act 4?

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jebroni wrote:

I spent so long just to get a 6L CoD, and it bothers me that it could just be worthless in act 4 expansion.

Welcome to Path of Exile, permanent leagues. Repeat every new major patch.

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Hixxie wrote:

Divines are IMO worth more than Exalts.
If you consider they are more rare, and they are more valuable when using just after patch notes release and before server gets patched (Legacy items). 1:1 ratio.

Your "opinion" on the value doesn't matter. Exalts are empirically worth more in the steady-state, and OP clearly said he wants to leave for several months and then come back to find value. That means he won't be around just before patch hit for reselling dozens of divines.

I will tell you how what you need to do to stop worrying about the path of exile economy ... Get a life.