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.
most likely ethereum prices will reach $ 400 in the next few months as you target because ethereum shows a trend up, at moment, ethereum's price is now $ 255, a litle again more touched $ 400