There's a lot of hope for these stocks, but there's also a fair amount of risk.The S&P 500 remains near record levels as the markets have been strong this year. Finding good stocks to buy in such a hot market can be challenging. But a couple of growth stocks with lots of potential, based on their price targets from Wall Street, are Viking Therapeutics (VKTX -0.15%) and Riot Platforms (RIOT -4.10%). Here's how high they could go, according to Wall Street, and whether these are slam-dunk buys for investors.Vi ...