According to VitalikButerin, politician-issued coins pose a significant risk as they can act as bribery vehicles. By purchasing and holding these coins, individuals can increase the value of a politician's holdings without direct transactions, creating potential for corruption. This method offers deniability since holding the coins can be justified as an investment rather than a donation to the issuer, affecting their market value and liquidity. Investors should be cautious of the implications on transparency and market integrity. Source: VitalikButerin on Twitter.