Why do I keep going in this cycle :

From 0 => earning a few thousand from Air=> Playing coins earning tens of thousands => Greed => back to 0

Then continue from 0 => up to a few thousand, tens of thousands => then back to 0.

It has been like this for 4,5 times now, just finishing and then having something to get a little capital and then back to 0.. Is it my luck or I just don't know how to manage capital, control greed?