I invested some money two years ago, instead of my investment encreasing is decreasing, what can?

Invest more and diversify your portfolio. Many things will go up and down in a year cycle , with a diverse portfolio , you're more likely to get investments in things that are on the up cycle.

Either count your losses or hold until it goes back up. Completely depends on what the investment is really.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.