Is there an Ethereum online wallet comparable to the desktop client? I don't have 2 days time to download the blockchain.

18 f... dollars. Jessss

The all time high for the ETH/BTC is about 0.035. The price is just 0.026 now. The Etheruem has to work hard.

Because the pumpers want you to buy in so they can dump on you and take your btc.

May I ask you two questions?

What is your intent?

Look at all the desperate people who shorted eth try and get you to sell. Hahaha.

Please take a look at:
https://www.ethereum.org/foundation
There you can find out about the company behind Ethereum, it's a swiss non-profit organisation.

And it's decentralised just like almost any other cryptocurrency out there.

Hope that answers your questions.

Regards, djoser.

I have to say ETH is one of the currencies I've had the most success with flipping back and forth for some nice chunks of return of interest. It's not too hard once you learn to read the charts.

Margin trading is possible on poloniex, bitfinex aswell as kraken. As long as you have collateral in another currency you can borrow and sell coins. You don't need to have ETH in the first place to sell it. People are doing that a lot.
If you're bagholding the ETH you can offer it to lend to shortsellers and increase your holdings in ETH without having to trade it but the rates are pretty bad right now for lenders.