ihave some prl in my MEW and i wanna send some of them to kucoin but i have now 0 eth in balance should i have some eth in my balance or there is no problem i send my prl ?
Yes, you will always need to have some ETH (0.2 or 0.1 for example) in your wallet in order te pay for the transaction costs - GAS).
thanx but it's a lot 0.2 eth is high today you dont think that's 0.01 eth is enough? and what if the transaction failed, will my tokens lost since the transaction failed?
I've had multiple situations where 0.001 ETH wasn't enough, so to be certain, I keep 0.1 in MEW, always, because when you urgently want to move funds to an exchange, the last thing you want is for your order not to go through & that you have to buy ETH at higher prices at for example coinbase while losing valuable time & money.