How much bitcoin can my business buy?

Bitcoin buying is unlimited.

You can deposit as much cash as you want into your Strike Business account via wire transfer, buy unlimited amounts of bitcoin, then hold or withdraw your bitcoin to your custody. Selling bitcoin is also unlimited, as you can receive bitcoin into your Strike Business account, sell your bitcoin for cash, then withdraw your cash to your preferred USD bank account.

Businesses can also integrate with the Strike API for making programmatic bitcoin transactions, including buying and selling bitcoin.