...
I think using altcoin is more favourable as even if you lose out it will be that altcoin and not bitcoin which can grow quickly whenever some news come in as this is the king of all coins . Bought everyone has different reason to play with particular coin.
Obviously, its easier to accept a loss if you bet in altcoins, but I want to keep my balance in BTC. But for the withdrawal, it is better to use transactions in altcoins, because their cost is lower.