my choices are ripple,monero,ethereum,bismuth,neo,ubiq,lis,sia.
my first choice is ripple because ripple is both a digital currency and a payment platform with a growing client base, and it is run by reputable tech visionaries.second choice is monero because this altcoin is considered a low risk one, and its current trends indicate that its value could potentially increase by up to 5 fold within the next year. third choice is ethereum , price of ethereum is growing fast,so I think it is a promising year for ethereum.
bismuth is the first altcoin to use blockchain tech that is written in Python, which means it's very fast and adaptable.so bismuth can take place in top altcoin.