I think some of these predictions are unrealistic such as that of XMR, that is, from current price of $158 to $3000, that is way too much remember that although it is a very good privacy coin, there are still other privacy coins which will share that attention with it, not only that, altcoins like Ethereum are still there to take much of the attention. I wouldn't go into others also, but let your purpose of investing in them be about what they offer and not the price so that you won't be disappointed at the end; to be frank predictions has been found not to go as predicted. However, my own picks for 2021 starts with Bitcoin of course, followed by Ethereum and ends with ADA, maybe for now or maybe later I would add another.