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?
you should not store too much bitcoin in the exchanger because the risk is great, you should save it in the wallet that private key you save it much more secure, anytime you can send the bitcoin
You are absolutely right storing bitcoins in exchanges never been good idea as we have many exchanges already gone with big amounts and chances are very high you can lost your hard earned money without any advance notice keeping bitcoins in wallet is much better and safe as you can manage security as you want