I have some ETH in my account, when can i withdraw them? When will the exchange be ready?

never. this is just a scam, we lost our eth.
let's report them all to the sec, and let's bittrex blocks their funds!
just wait..be patience
this is ur investment u wont gain nothing if u talk scam and fud
all system run well, except for withdrawal..there is progress
even a litle bit slow, but still positive progress on system and security issue
be patience, rome not build overnight..piece by piece..the puzzle almost complete
anyway...
sec only works in US country
bittrex cant block anyone fund