Best Altcoins to Buy Today, September 23 – Dogecoin, Avalanche, SEI

Highlights:

• The best altcoins to buy today include Dogecoin, Avalanche, and SEI, each showing bullish setups.
• Avalanche jumps 40% in a month, fueled by rising on-chain activity and institutional interest.
• SEI forms a triangle pattern, with oversold signals hinting at a possible breakout above $0.35.

The crypto market displays mixed signals today, with the overall market cap hovering around $3.9 trillion. Amidst this mixed sentiment, the 24-hour trading volume has witnessed a gain of over 20%, pushing the value to $195 billion. Several altcoins are showing positive trends, which could lead to rallies in the coming sessions. In this article, we will discuss the best altcoins to buy today, such as Dogecoin, Avalanche, and SEI.

Best Altcoins to Buy Today

1. Dogecoin (DOGE)

The largest memecoin, Dogecoin, is trading on a bullish note with a 1.80% gain over the past 24 hours. Currently, the price is sitting around $0.2415 with a market cap of $36 billion. Despite this latest bullish rebound, the memecoin is down by 10% on the weekly chart. The resistance and support levels for DOGE have been noted at $0.30 and $0.20.

Dogecoin is recovering following a corrective drop at around $0.24. This region was pointed out by analyst Ali Martinez as a possible buy zone. His projection charts indicate a positive breakout to $0.50 in the next few weeks. The setup implies a final retest period, in which assistance might initiate the following rise stage. The market interest is high, and the memecoin has become one of the best altcoins to buy today.

This is a great zone to buy Dogecoin $DOGE before a bullish breakout to $0.50! pic.twitter.com/BH3yazgoWc

— Ali (@ali_charts) September 23, 2025

In addition, market analyst Mags noted that Dogecoin might undergo one more test before targeting the $1 level. The charts indicate a breakout could occur once momentum gains traction, and the market could experience a significant rally in the next few sessions.

2. Avalanche (AVAX)

Avalanche has caught the spotlight today after recording a surge of 15% on the daily chart. The rally fuels the bullish momentum, which has pushed the price from $23 to $36 over the past 30 days. During that period, the altcoin surged by almost 40%. As of this writing, the price stands at $35 with a trading volume and market cap of $2.57 billion and $14 billion, respectively.

The on-chain activity of Avalanche has increased, and Total Value Locked is at its highest since August 2022. This influx is an indication of increasing activity in the AVAX ecosystem. Meanwhile, the future open interest on exchanges is at $1.84 billion, approaching records. Increasing OI implies new capital is coming in, which can be used to support higher price movements.

Avalanche DeFi hit its highest TVL since August 2022. pic.twitter.com/1iO0jTp9ae

— Avalanche🔺 (@avax) September 22, 2025

Moreover, AgriFORCE recently announced its rebranding to AVAX One. The company intends to raise $550M to stock AVAX tokens. As institutional interest increases and the ecosystem soars, Avalanche emerges as one of the best altcoins to buy today as the market gains momentum.

3. SEI

SEI is exchanging hands around $0.2930 with a market capitalization of $1.8 billion. With a modest gain of 0.80%, the altcoin is trying to regain its ground after declining by 7% over the past week. Moreover, its trading volume has dropped by 20% to $159 million, indicating a decreased market activity.

Crypto analyst Hailey LUNC has provided insight on SEI price action on the daily chart. The price action has now created a symmetrical triangle after recent consolidation. In addition, the RSI is flashing oversold, and selling pressure continues to diminish. These indicators usually precede breakouts in trend changes.

🚨 $SEI Alert🚨

A symmetrical triangle on the daily chart indicates a potential breakout.

RSI is oversold

With decreasing selling pressure, a bullish move could be imminent.

Key resistance is around $0.35; a breakout above this level could target $0.44.

Do you hold #SEI? https://t.co/d5nccyddI9 pic.twitter.com/8YNGvO0Z2s

— Hailey LUNC ✳️ (@TheMoonHailey) September 22, 2025

Traders need to watch for a confirmation of the resistance around $0.35. A clear breakout would create an opportunity to go to $0.40, then up to $0.44, on momentum. Investors who are researching the best altcoins to buy today may track SEI.