I can confidently say that ETH will be the cost from 10K - 15K in translation from 2019 to 2021.
I think that these are very small prices, because now there are very many chances that institutional investors will start investing big money and very good forecasts that crypto currencies will be very expensive.
Seeing the current condition is optimistic that crypto will have a better price. Value is safe and still has strength in the community, investors will increase and many will hold coins to be truly valuable.