I think that big trend in 2020 is staking + DeFi. Tezos, Algorand, Aion, Ethereum (with upcoming PoS) can make moves in this year. I like Tezos platform because it has better governance mechanism, great partnerships and funds to develop. Ethereum is without any doubt leading altcoin but I think that we can capture even more value in tokens like LINK, 0X, MANA, FOAM etc. which are using ETH infrastructure and security but building their own things. That's my cents!