What makes you think the stock market crashing is not his aim?

Devaluating the dollar might be the goal, not a side effect: A Users Guide to Restructuring the Global Trading System

Nope, that’s not what communists mean, when communists talk about communism. What you describe is the dictatorship of the proletariat, not communism aka the time when all means of production are owned communally, everyone enjoys working according to their ability and lovingly shares all goods according to their needs.

Of course, if you use the term “communism” to refer to the political movement that tries to achieve communism through revolution and the dictatorship of the proletariat, you’re 100 % right.