My favorite coins to hold in the long run are Bitcoin and Ethereum,these two coins are the best so I'm sure holding them for the long run. I think the market is always fluctuating, but when I hold these two coins, I am completely reassured,just be patient I will get profit!
It can be said that the strongest and safest coins for the long term are bitcoin and ethereum, but to get big profits then buying new coins is a good thing, some new coins that have bright prospects are Tezos, Aurora and IOTA.