3 Altcoins To Watch In The Third Week Of December 2025

The crypto market remains cautious, but some tokens are facing important tests this week. As prices move sideways, attention is shifting toward three altcoins to watch in the third week of December. Each has a specific catalyst approaching, from supply changes to network events and shifting holder behavior.

These setups could drive sharp moves if buyers or sellers take control in the days ahead.

SEI has been under steady pressure heading into mid-December, and price action reflects that caution. The token is down roughly 23% over the past month and more than 60% over the last three months, keeping sentiment fragile as the market looks for direction.

At the time of writing, SEI trades near $0.124, consolidating inside a broader falling wedge structure on the daily chart. This pattern often appears late in downtrends, where selling pressure slows, and the price begins to compress. For now, SEI is hovering just above the lower boundary of that structure, making the next few sessions critical. That tension qualifies SEI to be on the altcoins to watch list.

Momentum indicators offer a mixed but interesting signal. Between December 5 and December 14, the SEI price made a lower low, while the Relative Strength Index (RSI) formed a higher low. RSI measures momentum strength, and this bullish divergence suggests sellers may be losing control, even as price remains weak.

Want more token insights like this? Sign up for Editor Harsh Notariya’s Daily Crypto Newsletter here.

That said, near-term risk remains elevated due to SEI’s scheduled token unlock on December 15. Around 55.56 million SEI, roughly 1.08% of the circulating supply, is set to enter the market. Token unlocks often increase short-term selling pressure, especially when broader sentiment is cautious.

Key levels define the setup clearly. A clean move above $0.159 would signal that buyers are absorbing unlock-related supply and could open a rebound toward higher resistance zones. That includes $0.193 and even higher.

On the downside, a drop of roughly 3% from current levels, to $0.120, risks a breakdown toward the lower trendline. That would weaken the bullish divergence thesis.

Bittensor price action has compressed into a tight range ahead of its upcoming halving, setting up a clear decision point. TAO has been trading inside a symmetrical triangle on the daily chart, showing balance between buyers and sellers after weeks of downside pressure. That kind of buyer-seller tussle makes it one of the top altcoins to watch in the third week of December.

1/

The TAO Halving is approaching, Here’s what changes and what stays the same…