Prominent Bitcoin advocate Max Keiser has raised significant concerns about the US government seizing all the Bitcoin ETF BTC in the interest of national security:

"1. Gov seizes the ETF (for National Security) 
2. Before they send you your $USD 
3. Price moves up $100,000 
4. You pay tax on the gain from the payout and with what’s left you buy BTC at a price $100,000 higher 
5. Price crashes 
6. You’re now sitting a net-losing position from where you started."
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