Investors largely look at penny stocks to buy from a trading or speculation perspective. The idea is to sell when the stock doubles or triples. In most cases, this strategy makes sense because penny stocks largely represent companies with average or poor fundamentals. The risk factor is therefore high and penny stocks are not worth holding in the core portfolio.Having said that, there are exceptions. Several high-quality growth stocks of today were penny stocks at one point in time. In the universe of penny ...