MicroStrategy plans to sell US$500 million in convertible bonds to buy more Bitcoin.
The company has over 1% of Bitcoin's circulation supply with 214,400 BTC worth US$14.52 billion.
The 2032 bonds, targeted at qualified institutional buyers, have a 13-day option to exceed US$75 million.
MicroStrategy's sale of bonds for Bitcoin investment shows its strategic focus on the digital currency, which it holds more than any other company.
The notes can be converted into MicroStrategy stock or cash under certain conditions and accrue interest semiannually.
This is part of MicroStrategy's blockchain efforts, which include using Bitcoin's blockchain to secure digital identities.
MicroStrategy's investment shows a growing trend of corporations using cryptocurrency in their treasury strategy.
Company founder and chairman Michael Saylor has promoted Bitcoin.