these token sales are successful because people who buy into them are selling off their profits from buying Ethereum (from $0.88 in Jan '16 to $193 today >2000% return). Its a diversification play of course. Look how much the DAO raised a year ago.
Its ridiculous that the adults in the room like A16Z, USV, Balaji are falling into hypnosis.
ICO's coming out have no product, no users, just a white paper and a nice website, with an ERC20 contract address for deposits.
If you talk to anyone buying these tokens, they all say the same thing, that they're buying to flip the tokens on Poloniex for a quick buck.
A recent example is Gnosis, which raised $12.5M by selling 4.17% of their tokens at $30 each during the 1st auction round. They started trading at $60-100 a week after the sale and now are trading above $200.
Look at the charts of coins delisted by Poloniex. immediate 50%+ drop. The value of these tokens is their liquidity. Take that away and you won't see these valuations.
For traditional VC's, if companies let their shares float on exchanges, the SEC mandates financials. These tokens are designed around hopes and dreams. Most certainly a bubble but more so a game of musical chairs, make some money while the music is still playing.
Bitcoin at the end of the day grew in price from speculation BUT it had a real use, albeit in the black market. It has grown from that since 2013 but not by much.
P.S. Token sales don't even give up equity. These people are paying millions for API keys they can't yet use? I don't think so.