Buying and holding companies for the long term is a mindset that every investor should adopt. The goal of long-term investing is to identify the best companies and hold them until they're no longer exceptional, thereby generating a substantial profit along the way. Some stocks have more robust investment cases than others, but one that I particularly like is Taiwan Semiconductor Manufacturing (TSM).I've got 10 reasons why it's an excellent stock to buy now and hold forever, as it looks like a stellar deal. ...