This is the past 30 days change on Coinmarkets.today
Avalanche is up 25.7%, BNB + 15.8%, DOGE +6.8%

https://coinmarkets.today/

Coincap is showing these 30 day gainers, September 30 2025

https://www.coingecko.com/

https://cryptobubbles.net/

ZEC is up +83% this month, +168% this year

https://www.coingecko.com/en/coins/zcash

https://www.coingecko.com/en/categories/zero-knowledge-zk

By far the most popular crypto coin in September 2025 was USDT

Market cap of USDT has grown dramatically since March 30th 2020,

https://www.coingecko.com/en/coins/tether

Holders: 8,829,350, Circulating Supply Market Cap:

$174,690,086,251.00

https://etherscan.io/token/0xdac17f958d2ee523a2206206994597c13d831ec7