In trading, everyone expects to buy low and sells high. I believe that it is common thinking for all and we all want to gain some profit from trading. Strategy will not same except it. Other things can be different but expecting Profit from buying will be same as I believe.
If the market was predictable, then everyone would get a profit and there would be no those who lose money here. But at the expense of whom will the profit be made, if no one loses money? Therefore, there will always be those who make a profit and those who lose their money on the market.