i think if you bitcoin trading use pair fiat money
you must have big capital money can get big return
if you use low capital money profit is very low, if good altcoin trading, but is high risk
And also once the price of altcoin pumped, the percentage of rising may surpass 100%
You can't just look at the max profit which is potentially achievable by trading altcoins. You should also take into account all the losses incurred due to some, or most of these coins turning into scams at the end of the day. And these loses are final in most cases, you can't just wait out till the price reverts because they just get thrown away for good. If you consider that, Bitcoin will be a hands down winner in the competition with the legions of altcoins flooding the market.