Sure, that's also a valid strategy, so long as you are thinking about ways to protect the value of your account you're going down the right path. At the very least place half of your position under a stop-loss order then.
I strongly urge that people to not trade believing they are going to become rich suddenly, instead learn to manage risk and try to remain objective you will do well. If you do well long enough you may actually build wealth, but if you reach for every last inch and try to predict the top you're more likely to just lose it all.
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