The amount that you profit from the trade depends on the number of pips times the monetary value of a pip. And the value of a pip depends on the size of the position taken. It is just maths. But, of course, the pip value is the same whether the price goes in the right or the wrong direction.
So the only way that you can avoid destroying the capital in your account is to position you stoploss such that the number of pips x value per pip = x% of your account balance (whatever you decide “X” should be). The only way that comes to mind where you can have an open opportunity on the upside compared with a limited risk on the downside is to buy options instead of outright spot/cfds. ( I am not talking about binary options!).
It is an excellent trade size when learning and test-driving a strategy where you want to experience it in live conditions rather than just demo. It cannot do serious damage to an account unless that account is really small. The core emphasis when learning to trade is to achieve consistency, experience and confidence.It is not so important how much money you make. That comes later when all you need do is ratchet up the position size and expand into multiple trades, scaling in/out and other such more advanced techniques.