I guess to get these profits in 2019, you had to invest in them in 2018. I have heard about Cosmos. They say this altcoin has a lot of chances to get into the top-10. I invest in Monero and Litecoin.
For altcoin investment, I see coins with good prospects, ETH and LTC, because the increase is quite significant. Today the ETH increase reaches 2.60% and LTC increases 2.94%
Looking at the percentage increase, it can be interpreted that the two coins received a positive reaction in the crypto trading market, where many investors bought to be invested or traded in the future.