I wish I would have bought double the ETH I did when it was at $84 a coin. I got a $100 worth when it was at $84.62 a coin. I intend to HODL it till it goes back up over $400. After it reaches that I'm going to get more TRON with it. I have been using Binance for my exchange. I'm US-based, so I have to buy ETH through Coinbase then send it over to Binance to exchange for TRON.
If we know that earlier that the price will bounce back that easily after it touch $84 then all of us could be millionaires. This is a game of volatility as the price will depends on the market supply and demand. We need to place our orders in hope that it will rise the price in few days or we need to wait until it fully recovers.
You are lucky that you managed to buy it at $84 as most of us here are waiting if this will hit the bottom to $50 which is now far to happen.