Surely you see the difference between managing money on the open internet and closed systems such as planes and spaceshipts. The incentives to break those othe

Surely you see the difference between managing money on the open internet and closed systems such as planes and spaceshipts. The incentives to break those other pieces of software are different. Very few people are incentivized to hack planes to crash and kill people. Even fewer are incentivized to hack the space shuttle. Not to mention those pieces are rarely exposed on the public internet, or have connectivity at all. But massive amounts of nigh-untraceable free money? Ton's of people are incentivized to go for that.