The chipmaker's expansive end-market opportunity is the reason why it could keep delivering outstanding gains over the next decade.Buying and holding solid companies for a long time is a tried and tested method of succeeding in the stock market. This strategy allows investors to capitalize on secular growth trends and also compound their investments. And Nvidia (NVDA 0.94%) is a prime example of how this philosophy has helped people become millionaires in the past decade.If you bought $5,000 worth of Nvidia ...