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
I am not sure how things will hold together for Ether and the rest of the contracts only time will tell whether they are able to cope up with the ever growing demand,i think majority of the alt coin which are having huge volumes will be still there but i really cannot predict what the price would be,but i am sure the major coins will be there three years from now.