Predictions of Marx which came true:
Monopolization
Globalization
Concentration of wealth within the 1%
Fall in the rate of profit
"He happened to guess right in all his ramblings"

Shirt: Decommunization

Predictions of Marx which haven't come true:
The revolution will begin in the most developed countries

"Ha ha ha, he didn't guess right, LOL
It's clear: Marxism doesn't work"