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
don't know about Ripple because it has not been on my radar but keeping an eye on it for now
2) Ether / because its smart contracts and scripting functionality
this is a valid point and many other projects are using the eth algorithm which guarantees continuous ether demand and prosperity.
3) Dash / Instant send and private send
Dash has continued to show continuous growth and i believe it will make it to 2020 among other successful alts.
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maybe waves should be put on the watch list as well......