Re: is he still a US citizen ?
> You pay tax on the income that generates those cash balances.
Yes, the IRS is chasing him for income from his digital currency adventures. If that income was held in a company, and merely spent for his personal gain (similar to Trump), then his bill would be a lot lower (assuming he can get away with such expenditure for personal gain as tax deductible). Until the company relocated the cash back to USA, it would not become liable for US taxes, just the local corporation tax so he can pick a friendly/convenient tax haven to host the company