Is it best to invest or speculate?

When I think of the term speculate I always think of Andre Kostolany, the author of one the first books that I read about financial markets that had a huge impact on me. His

What is the best Trading style for you?

What Trading style should you use? Before we start trading, we should think well what is what we are going to do. We should “write down” some little rules about how long are we