ICOs should definitely NOT be regulated.
The massive fluctuations we see in the cryptoworld are possible only as a result of the unregulated environment ICOs and cryptocurrencies are immersed within.. regulate it and you'll get something like the stock market where the only ones who make profits are insider traders and hedge funds.
Regulators please leave our cryptos alone..
Actually, that's not the reason for the fluctuations in price. The reason behind the massive fluctuations in price is because there is no ecosystem behind it and the price is based purely on a speculative model. Nothing else. Whereas, fiat currencies, stocks, commodities have financial ecosystems behind it - be it import/ export (for currencies), a company's products/ services (for stocks) and supply/ demand and use in industry (for commodities). All of these have nothing to do with regulation. Regulation would change a few things, but definitely not that.
What I am talking about is that, assuming money is a zero-sum-game (which we, as investors, should do), in order for 100x opportunities to be there (see stratis, ethereum, monero..), there need to be several 0x scams. If the environment becomes more regulated, you definitely won't have as many 0x scams anymore that's for sure, but you can also forget about those other gems. That's how I see it - but you make a good point about the lack of an ecosystem being also what makes the price work for cryptos most often than not on a speculative model. Wouldn't say this always apply however; check coins with actual use such as monero and all those coming dexs which will use the token for their functioning (kyber eidoo etc etc etc).
My point is: if you create regulations, societies have to adhere to those in order to function, this create a steeper initial investment in order for a new token to exist and thus 'betting on the underdogs' becomes less interesting.