The difference of trading and investing, trading is when you have to exchange in economics example is you have to buy fish you have to trade money for you to buy fish. And investing can be stocks, bonds, mutual funds, interest-bearing accounts, land, derivatives, real estate, artwork, old comic books, jewelry -- anything an investor believes will produce income or become worth more.
Most of your statement is wrong although you have the idea of it. You are defining trading in the old way, right now trading and investing can either be used in both Stock or Forex even in the Cryptocurrency Market. It really does not involve any exchange of goods but Trading and Investing can be differentiated by how long do you hold the Stock or Currency or Altcoin. Trading typically refers to short term profit taking which can involve hourly to weekly positioning while investing takes months before you profit from it. Trading also relies heavily on Technical Analysis while Investing relies on Fundamental Analysis.