You have added facebook (libra coin) into the list. Perhaps we might not be able to find that good profits in libra coin and hence speculating that coin in 2020 would perhaps be a waste of time. What I think about libra is that it would be something similar to stable coins and would not have these high volatile markets which would only make the investors invest one time and hold that coin in any corner of their portfolio bag just in case the coin has any pump in the markets.

But, daily traders might show their back to libra coin which would never be that exciting to watch. I might agree with the rest 4 coins as you also have mentioned their benefits/reasons behind being a strong coin to watch in 2020 and I am sure each of them would succeed.