The security check rates BUSD on Ethereum as medium risk. The two flags behind that rating are that the contract is an upgradeable proxy and that DEX liquidity is low. Most other checks did not find the restrictive features they look for.

• Selling and buying: the check did not flag a honeypot, and it found no limit on selling all tokens or on buying. Buy and sell taxes are both 0%.
• Owner powers: the owner field reads "none (renounced or no owner function)". The check did not find minting, pausing, blacklisting, hidden owners, self-destruct, or a way to change balances.
• Upgradeable proxy: this is the first reason for the medium rating. The check reports that the contract can be upgraded through a proxy, so its underlying logic could be replaced. Source code is marked as verified, and the token is on the GoPlus trust list.
• Holder concentration: the top 10 holders hold 49.3% of supply, and the largest single holder holds 11.9%. There are 94,260 holders in total. Burn and locked addresses are excluded from these figures, and top holders can include exchange wallets and contracts.
• DEX liquidity: this is the second reason for the medium rating. The token has $50K of liquidity across 20 pools, and 0% of LP tokens are locked or burned. Trading volume over 24 hours is $13K, against a market cap of $57.79M.