Tether regularly prints trillions of USDT (out of thin air) and sells it regularly at highly discounted prices to the big exchanges and the big whales. And the big exchanges & big whales work together regularly and use this regular flow of cheaply acquired funding to manipulate Bitcoin price on an ongoing basis, in order to regularly liquidate long trades and short trades, as when trades get liquidated, the exchanges make a LOT of profits, in which the whales also have their cut. This is why 90% of crypto traders lose money.
And all crypto traders like idiots are looking at technical and fundamental analysis. Bitcoin price is in the hands of the big whales and all other coins and altcoins prices fluctuate as per Bitcoin price.
The best way to make money in crypto is to buy and hold the gems long term.