My friend loves opening different trades at a time, most at times is difficult for him to control what's should be. Trading on free chart with multiple opening can be very dangerous. Yesterday he experience unusual hit when bitcoin price drops again, four trades loss at once when the market go against him. Personally I don't advise multiple trade especially when you're not familiar with trade
It depends on your friend's risk and reward ratio. If you like to take a higher risk, then you can get a higher reward. So the better option is to control the risk and reward ratio.
Eg: Higher risk -> Higher Reward or loss