Some people says that the wrost thing to do is leave your bitcoins in some exchange.
I have 200 usd of btcs in Payeer, it is a online wallet but it also has a exchange.
Do you recommend to me to move this bitcoin to a wallet like Electrum?
Yes if you want save bitcoin you must save your Bitcoin in your wallet bitcoin private.
Example Mycelium , electrum .
If you save your Bitcoin on exchanger , I believe your Bitcoin Will be loss your control.