A handful of crypto-related stocks including MicroStrategy (NASDAQ:MSTR), Marathon Digital (NASDAQ:MARA) and Bitfarms (NASDAQ:BITF) face some selling pressure as the first bitcoin futures ETF (NYSEARCA:BITO) starts trading on Tuesday with massive volume. MicroStrategy (MSTR -2.3%), which serves as a benchmark for the price of bitcoin (BTC-USD), is down the most out of the bunch intra-day as the ProShares Bitcoin Strategy ETF (BITO) debut takes some light away from the bitcoin (BTC-USD) "hodlr," Bloomberg notes. According to MSTR's CEO Michael Saylor, the company most recently purchased an additional 5,050 bitcoins for ~$242.9M in cash at an average price of ~$48,099 per BTC; As of Sep. 12, MSTR hodls ~114,042 bitcoins acquired for approximately $3.16B at an average price of ~$27,713 per coin, according to a tweet he made on Sep. 13. Marathon Digital's (MARA +0.7%) stock initially gapped lower out of the gates, but has since recovered to net positive territory