Your asking bithumb with a very obvious answer. Hackers have no limitations and internet sites or even exchanges are vulnerable to any attacks when huge amount of money is the price. It is even a normal thing in internet and we can’t do things to stop it other than to cut the source.

Are you gonna hope for a internet shutdown? If not then stop being a crying child as it won’t even make a difference.

Technology is advancing and upgrading as well as the criminals, so take a look on your own security first and leave this professional problem to the experts.