Michael Saylor’s Strategy, formerly known as MicroStrategy, is facing one of its biggest tests yet has tumbled by more than 55% since the year started in the stock market, per data from Google Finance.

Strategy, the self-styled Bitcoin treasury company that until recently was known as MicroStrategy, said it acquired $1.99 billion more of the cryptocurrency with the proceeds from last week’s convertible bond sale.

Strategy may resume Bitcoin purchases after a break, signaled by Michael Saylor, with $31B invested and $15B in unrealized gains.