You did a fabulous work，dude.If i have to choose one from these coin，i think LTC would be my decision，because there are saying：BTC is gold，LTC is silver. Besides，LTC is already surviving in the market several years，and always staying on the top 10.
LTC is indeed good and not a weak coin till now but I also have an opinion to choose Ethereum about it. Ethereum is also in the top 10. Many types of virtual currency to choose from and you learn from which side to make a profit.