These top tech stocks could double your money in five years.There are no guarantees in the stock market, but investing in industry leaders with a track record of above-average growth is a relatively safe way to grow your savings over time.Google parent Alphabet (GOOGL 0.66%) (GOOG 0.56%) and Microsoft (MSFT 1.44%) are solid companies that generate billions in profits every year. An investor can buy one share of either stock for less than $500. Here's why these two stocks are compelling buys right now.1. Alp ...