This is quite the general opinion, which is something they want you to believe. Sure, hacks are an actual problem, but the main problem in my opinion is an inside job. It's way too easy to just put the blame on hackers as if they were behind it, while in reality it only distracts attention away from the actual brain behind the theft. Coincheck in every way acted shady, especially if you look at how much coins they had sitting in hot wallets. Seriously, who leaves half a billion worth of one single altcoin in hot wallets? In no shape or form is XEM such a large coin that it requires the exchange to stack their hot wallets like that. It's impossible to prove, but I strongly hint towards an inside job....