What is the best coin for holding ? BTC or LTC or ETH ?
BTC. in the long run if one of them increases in price usually the other two would increase as well
unless there are certain users who dump one for the others, for whatever reasons
but these day each of these coins have their own altcoin markets where they trade most
ETH trade volume influenced mostly by its tokens while LTC has very limited markets
if you can't decide, hold them all in your portfolio like this: 50% BTC, 25% LTC, 25% ETH