Though the saying goes "Once beaten, twice shy".
In life, its either you learn from others mistakes or you learn from yours, and it's sad that most people do not learn either ways.

It's also disheartening that when people try to produce good things in the world for others to gain and benefit from, there will always be vermins out there plotting the worst, and this is basically part of the circle of life sadly. I think we should all try to be more observant and careful and most importantly don't let greed get the best of you. Cheers