By Tony Owusu Cannabis stocks had a rough first half of the year, but the appetite for marijuana in the U.S. is growing. Cannabis stocks are dropping like BlockFi’s valuation. Cannabis stocks aren’t alone in their decline, of course, as markets have been in a steady fall since the the Federal Reserve hiked interest rates in early May. Investors flush with cash during the pandemic pushed cannabis ETFs like Amplify Growth Opportunities (CNBS) – Get Amplify Seymour Cannabis ETF Report to all-time highs. CNBS reached a closing high of $34.75 in February 2021. Since then, the index is down nearly 8…