I just minted a little over 10 Postoken. Glad to see that the current ETH gas price stays at 1 gwei.
how much time will it take by 1 gwei ? i always use 20 gwei on MEW default ，i do not know whether it will too slow by 1 gwei.
It depends on the current network load. Gas station
https://ethgasstation.info/ may give you an answer. I remember the time when 0.1 gwei was enough for confirmation withing 1 min