The problem is that you're giving money to a relatively unknown company while speculating that the company will create inherent value. Unlike with stocks, you don't have ownership in the company or any voting rights. There is nothing stopping the company's creators from distributing the ICO money to themselves (there might be a board, but since the company isn't public who knows who the board is).
In this case the SEC is right to step in so there aren't a ton of unregulated securities going around and a lot of consumers potentially getting screwed.
Even with cryptocurrencies like Bitcoin, it can be scary. You're literally getting into the ForEx market, which is known to be one of the riskiest markets in existence. With other currencies, at least they're backed by a government that (at least at least attempts) to regulate it's value and protect it from manipulation. With bitcoin, I saw that 40% of all coins in existence are owned by less that 1,000 people. How do we know that the current price inflations aren't a manipulation (or collusion) to jack up the price, sell for USD, then crash the market? It's not illegal/collusion because Bitcoin isn't regulated.
This is definitely a rant, but I have some serious concerns as to where this market is going. Would love to hear other's thoughts.