Which altcoins do you think will see year 2020 with prosperity and why they will survive?
I think following will be there
1) Ripple / because of its application in banking use
2) Ether / because its smart contracts and scripting functionality
3) Dash / Instant send and private send
These one for sure. I will add also Monero and Zcash to the list (and any other alt that wil be able to guarantee a certain degree of anonimity)