Nigel Farage has taken a stake in Stack BTC, a small London-listed company that plans to build a portfolio of British businesses alongside a Bitcoin treasury, in a £260,000 fundraising that also brought in cryptocurrency firm Blockchain.com as a strategic investor. Stack is chaired by Kwasi Kwarteng, the former chancellor whose mini-budget in September 2022 triggered a brief but severe market crisis, and whose tenure at the Treasury lasted just 38 days.