a few days ago there were more than 200,000 unconfirmed transactions so ..
What is wrong is this?
Block time 10 minute too long
or
no enough miner to confirm transaction?
There are miners to confirm your transaction, and the block time is not a 10-minute interval guarantee. Besides, you already have paid a small fee for the tx so the only choice you have now is to wait. Accelerators sometimes come with a small fee to push the tx, but there are free alternatives though you need to time them in order to get it free.
it looks like it happened maintance.
What are you talking about? The network doesn't go under maintenance lol
EDIT: It came from a German exchange I presume? Man that's some awful fees to pay, and really awful if they are still taking a cut from withdrawals.