why does basicly every single chart look the same when looking at an altcoin in the usdt pair? this is something thats lagging behind from the older days of crypto. USDT or other stablecoin are not fiat currency, they are pegged and can easily be de-pegged from their 1usd value. very few coins have an actual Fiat pair on a fiat gateway. this have gotten alot better the last 5-6 years, but when binance first initially launched they had no way for you to buy crypto. you had to buy btc, eth, ltc on a fiat gateway and transfer it over to trade the coins you wanted. you had no coinbase wallet to do swaps, or crosschains to swap your coins.
At that time, and still today most coins in the USDT pairs are actually valued by their /btc pair, their value in sats converted into usd. their price in usdt is only based on what the altcoin is worth in sats in its /btc pair. when bitcoin pumps 10%, most shitcoins pump 8-10% aswell in the usdt pair, but if you want to see if the shitcoin is actually making gains, you got to chart the /btc chart and not a stablecoin pair. the shitcoin will only pump harder than btc, if the shitcoins value in sats increase. a good exaple of this is nuls. its been at 0.2-0.3 usdt for years now, and it keeps dropping in sats everytime btc increase in price. you woulda made alot more money by just holding btc, eventhough on paper its 'worth abit more in usd' its tanking like no tomorrow in its /btc pair.
the best tip for finding those gems, is to look at /btc pairs and not /stablecoin pairs to see if a shitcoin is outperforming the market. a shitcoin can pump 3x, but you can easily just have made more money if you just held btc if the btc pair is not the reason its pumping.
as always, make you own due diligence, and manage your risk according to what you are willing to lose, not what you are willing to profit.