At the end of 2018, the price of the Ethereum is almost $ 50. You should buy as much as possible for Ethereum coins at that time. From the beginning of 2019 Ethereum slowly increased and until now the price of Ethereum almost reached $ 200. If you sell coins now, of course, you will have many advantages.
So for the people who invested to the value of $50 each ethereum because ether already reached $200 so their capital will become 4 times . It menas if they sell their ethereum they will earn money but if you are investors of $1000 plus per ethereum in 2017 you can still hold ethereum to not lose money because that's best for you.