These Altcoins Could See Higher Volatility in September—SUI, APT, SEI, and More

As the crypto markets have witnessed some relief this month, some altcoins are believed to be highly volatile this month. Macro uncertainty, token unlocks and shifting risk appetite have all together been creating conditions for sharp moves in both directions. The volatility of several large-cap and mid-cap tokens is rising, with $SUI, $TIA, NEAR, and $INJ are on the radar.

Sui ($SUI)

$SUI enters the September trade, consolidating within a tight range, following a pullback from the local highs at $0.95. Currently, the price is consolidating around $0.7, while a scheduled unlock is adding supply pressure. More importantly, a recent Switchboard oracle compromise affecting Sui DeFi protocols has weighed on sentiment. However, the $SUI price is required to reclaim $0.75 to $0.80, while holding above $1 could strengthen the bullish trajectory.

Aptos ($APT)

Aptos is also due for a scheduled unlock in September, where nearly 14.36 million $APT, roughly worth $7.4 million. The release represents about 1.8% of $APT’s market cap, making it important for September volatility. Currently, $APT price has been forming consecutive lower highs and lows while holding firmly above the support around $0.5. It remains vulnerable to selling pressure around the unlock, but a sustained recovery could signal that demand is absorbing the additional supply.

Sei ($SEI)

Sei staged a strong upswing in August, attracting more than 25% gains, but failed to clear the $0.05 resistance zone. Despite the pullback, the token remains strong above the $0.045 support, while the trading volume has surged to more than 76 million $SEI. The major catalyst ahead is the monthly unlock of roughly 111.5 million $SEI, equivalent to about 1.5% of the market cap. Therefore, holding above $0.045 could keep the recovery structure intact and help $SEI price to reclaim $0.05.

Celestia ($TIA)

Celestia ($TIA) faces continued supply additions in September, with daily releases of around 344,924 scheduled through the early part of the month. This makes absorption an important factor for price. $TIA remains a high-beta altcoin, and a breakout above $0.048 with strong volume could produce a strong upswing. Besides, a failure could keep the bearish momentum intact, exposing the token to the support around $0.041 to $0.040.

Injective ($INJ)

$INJ has a more fundamental catalyst to watch in September, which is the planned migration to native USDC to improve liquidity and ecosystem activity. Injective is also pursuing institutional RWA infrastructure and operates a token-burn mechanism; September’s community buyback was valued at more than $168,000. The $INJ price is currently trading around $4.8, facing immense selling pressure after hitting the local highs above $6. Therefore, holding $4.75 support could be extremely crucial for another recovery attempt.

The Bottom Line

Sui, Sei, and the other altcoins enter the September trade with different catalysts, but all may witness sharp swings as supply events, ecosystem developments and broader market sentiment shape trading activity. While token unlock could create short-term selling pressure, improving network activity and stronger technical setups could provide strong upside.