The security problem bothers me too much. but we are in the 21st century. we are moving into the digital economy and the topic of security will be even more acute over the years. People need to become more literate in terms of security.
People (including myself) should stop using centralized exchanges, so they won't have to suffer from these 'hacks' anymore. I do some occasional slow trading, which quite often is being referred to as buy low sell high trading.
As soon as I have bought the coins, I have them directly be sent to my personal offline wallet. I will not leave any coins on an exchange while sleeping, that's something I have promised myself.
The only thing I do have left on exchange is fiat. I fully accept the risk of what might happen when an exchange goes down or gets hacked and gives all accounts with balance a fresh haircut ~ my coins is were the priority lies.