Hi,
I want to earn interest on my coins (BTC,ETH,LTC) therefore I prefer to leave these in Exchange for funding purpose, however I have No plan to sell or exchange with other coin in near future.
I always keep my withdrawal blocked by changing password every 5th day.
Is it 100% safe to keep crypto's in exchange like Bitfinex or others with withdrawal locked ?
Using wallet is more secure than exchanger, once I have exchanged my coins I immediately transfer it to my local wallet. Which is according to my friend he lost several coins in his wallet and he doesn't know why it happened. But of course you have to pick best exchanger out there, by reading its user review in order to minimize your lost in the future.