[Deribit: An options trader buys 800 BTC bull call spread expiring on May 15] Odaily Planet Daily News - Lin Chen, Deribit Asia-Pacific Business Head, stated in an article that an options trader purchased an 800 BTC bull call spread expiring on May 15, buying $80,000 call options and selling $85,000 call options. The trader is optimistic about BTC's price surge early this month.