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And you think that is enough to keep you winning or profiting for long time and regularly? You must expand your reading to other areas of trading, which includes how the price actions reacts, risk Management, and more importantly study the coin you are to trade it's very essential if not for btcusdt then any altcoin should be carefully monitored before entering trade otherwise you could be rugged pool.
Trading must start with careful planning and be supported by the right strategy. All traders want profits, so it is natural that they need to try harder to get them by doing analysis and so on. Trades that are not executed with a strategy may still be profitable, but in most cases, they tend to lose money in the end. They will almost certainly miss so many opportune moments to take profit, even if they don't lose.
It's up to them what pair they want to trade, it's not just bitcoin. As long as the assets being traded can give them a profit, then it doesn't matter in my opinion. As long as they know the risks of trading, they are free to do it according to their own wishes.