Best overall trading platform for BC and ETH right now?

TradeStation sold my ETH at a loss ($2900) after I held it at a loss for 2 years because I bought in when it was high and two weeks ago they discontinued cryptocurrency services which I was unaware of until now. I’m thinking of using the $2900 to buy ETH again but I might add $1200 so I can get a whole ETH again. I want my money back and am willing to stake the $2900. I’d appreciate some advice.