• Halt every transfer

  The issuer holds a pause key and can stop the whole token from moving, for everyone, at once.

• Mint without limit

  The issuer holds a supply key and the supply has no ceiling. Any market cap here is priced on today's supply, which can grow.

Read from the Hedera mirror node, where a token declares its keys as properties rather than hiding them in contract code. These are the powers the issuer holds, not a judgement about the token: plenty of legitimate projects keep a supply key, and a stablecoin needs a freeze key to comply with the law. What matters is knowing which ones exist before you buy.