I'm not sure I understand what you refer to here
Okay, you have a capital of 1000 dollars, and what exactly prevents you from successfully trading this capital with Bitcoin? How could you lose 50 dollars with Bitcoin and not lose it with some altcoin? Somehow, I have a feeling that you are actually talking about gambling, not trading. Apart from that, Bitcoin has recently shown quite a good amount of volatility on par with or even exceeding major altcoins. But perhaps I'm just missing something and you would like to expand on your thought a little further