what could be the best bankroll coin to invest with? i'm currently afraid on investing to litecoin bankroll since the last time a user almost swept the litecoin bankroll but their ltc investment of 35% on commission is a great promotion and seen that they have extended it to december.
Hard to say, LTC typically has the most action on it and therefore has the highest chance for gains (and losses as you point out). I personally recommend diversifying, so spreading out among all the coins. That mitigates some of the risk because then you can't lose all your investment.
Example: you have $300 to invest, so you put 100 into BTC, 100 into LTC, and 100 into doge. If someone comes and wipes the LTC bankroll you still have the $200 from BTC/doge. Whereas if you put all of it in on one you have no other investments to help balance out any hits.
Diversification is something you should do in almost all investments. Which works out here as well because there are few other coins.
You know why it is such a great deal? Because if one of them goes down, the others are fine, sure you are giving up on a chance that if someone loses HUGE amount on ltc, you are not all in on LTC so you might not make that much profit, but you are also providing security where if someone wins a lot of LTC you are not down that much since some of your money is somewhere else. All of these are important facts of diversification.
Plus do not forget that coins do go up in value in fiat as well, so if you invest in all of them equally there is a chance that you could actually make money not only from gamblers losing but also from crypto gaining value as well.