2 Stocks That Can Double Again in the Second Half of 2021Last year was surprisingly big for growth stocks. This year, the upticks have been harder to come by. Just 115 U.S. exchange-listed stocks with market caps above $1 billion have doubled through the first six months of this year, and most of them won't repeat the feat again in 2021.However, Revolve Group (NYSE: RVLV) and Funko (NASDAQ: FNKO) are in position to potentially double in value again in the second half of 2021, and investors should pay attention.The case for Revolve GroupIt's been just two years since Revolve Group hit the market, and it has been a wild ride. The online apparel retailer IPOed at $18 in June 2019, and briefly traded up to nearly $50 before heading back down to near that original level. Then, during last year'