I invested $100,000 into ETH when it was at $800. I was wondering if I should sell and re-buy or hold? Will ETH reach $800 again this year? 
This is serious amount to put on 1 coin! My portfolio is bigger, but it's spread a lot alts.
If you are looking on it as an investment, you should wait. If Bitcoin pass the 12K barrier again, ETH could easily hit $800. I believe that we will see a full market recovery in 6-12 months.