Amidst volatility, the world of cryptocurrency has continued to grow. A direct way of exposure is to consider buying Bitcoin or altcoin. Another way to consider exposure to cryptocurrencies is by buying crypto stocks. Riot Blockchain (RIOT), a Bitcoin miner, looks like an attractive option to consider. Riot stock has declined by almost 32% in the last six months. I am bullish on Riot for the medium-to-long term. It’s important to understand the reasons for the stock correction. First and foremost, Bitcoin has been jittery with a downward bias. After peaking out near $69,000, the cryptocurrency has trended lower.