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
That's only 3 years from now, in crypto may as well be 3 decades. I think new technology will replace what we have for smart contracts. EOS comes to mind. So Ether will not be a top 5 coin anymore.
Dash's tech isn't bad. Their private send is just mixing coins with the masternodes. Monero already does that without masternodes and bitcoin has its own mixing services. I think we'll see zcash move up and replace dash. That is if they can fix their trusted setup issues.
Ripple is a pnd and not real crypto but a system that will be used by banks. The XRP tokens themselves do not need to be used by banks as they will likely create their own tokens that are backed by fiat. Some may use the ripple network while others will build their own solutions based on the open source ripple code. I think ripple will die off.
Sure, one of the next big in crypto will be defenitely Radix/Emunie... It would be coupled with US Dollar, to avoid Price fluctuations and many new Features. But until 2020 there will happen very much