"Given what you know today (and how blockchain, cryptocurrencies, and decentralized networks work), would you still design the financial system and other systems (ex. identity, currencies, etc) the same way they are designed today?"
My answer is no, and that's why I'm still bullish on decentralized technology and systems winning in the long-term. In that case, investments in Bitcoin and Ethereum are merely call options for an entirely new financial world and a risk still worth betting on.