Cold Key owner retrieved private keys of all the sold 'cold wallets' he produced and as he was in need because of gambling he stole all the funds.
Which (apart of obvious sad event for card buyers/owners) is a very problematic for the whole "collectibles" market, any coin/card producer now will be asked twice "how may I trust you?".
Yes gambling can make any good person into a demon. That’s why from the old times Gambling has been considered as a sin. But in a world of free will and action, we can’t stop these types of gamblers. I am not saying all the gamblers are bad, the fact is that doing bad deeds for gambling will surely hamper other person’s life. Gambling in control is the perfect solution for these types of behaviour. If someone controls their addiction to gambling then definitely he will be in his limits and will be able to differentiate between good and bad.