In terms of returns what digital currencies do you predict are in the running for a podium finish in 2019?
Top coins but not specific, since every coins have the potential to pump high this year but 10,000% profit is not possible even if its bitcoin. Try to invest without expecting any return like this because you might be disappointed. New coins can go as high as 100% increase on their value but very few of them succeed on that one.
within a period of one year, I'm not sure that the coins in cryptocurrency can achieve such high price changes.
except for small coins that occur in price manipulation. for top coins, prices may increase several fold in one year, but not that high