2How to set up a Telegram channel? (A step-by-step tutorial) 4How to customize a Telegram channel? It’s yet another bloodbath on Satoshi Street. As of press time, Bitcoin (BTC) and the broader cryptocurrency market have corrected another 10 percent amid a massive sell-off. Ethereum (EHT) is down a staggering 15 percent moving close to $1,000, down more than 42 percent on the weekly chart. The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. 5Telegram Channel avatar size/dimensions
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