Because its really weird and new to attribute high value to small amounts of data you transact over the internet to a distributed system. The cryptography and game theory needed to stop anti-social nodes(hackers and other entities) isn't developed yet.
You're acting like a founder never ran off with a VC's money and that there also aren't legit cryptos. This is the real world. Scummy people exist in all facets of life.
They exist everywhere but that hasn't stopped them from being especially prevalent in cryptocurrencies. The financial system is pretty sketchy in general but cryptocurrencies seem to have a large amount of scandals for having such a low volume of people actually using them.
