In generally you just need to read more. All answers are already written.
1. Value is always as much buyer and seller value it. Most current crypto coins value is speculative. Tiny bit is real. Specially ICO coins was issued with different reason. More liek a share of a project then an actually money. So you need to ask yourself this question at exact currency.
2. Cryptocurency have no ethic. It is money. Money have no ethic. People that are using money have them. If they dont respect society or laws is ofcourse bad. They will get punished for it sooner or latter. I am sure everyone was already taught this.
3. It is simple they just will. Now since is so new ofcourse dont fit so well. Structure will modify to accept it. Most think that with crypto is end of governments collecting taxes. that si far from true. They will just adopt to collect them where tehy can. And they will be happy doing it since there wil be way more GDP to collect taxes from.
I almost agree about the first one but I would say the value is never real. Well, we can consider the price of electricity and miners and calculate the 'real value' but it doesn't matter at all. As for the second one, the money itself has no ethics. Nevertheless, the users' behaviour leaves some trace on the currency which can be considered as the currencie's ethics. For instance, btc ethics was really bad when it became popular as it was highly involved in the dark market business. Litecoin is rather famous as a casino cryptocurrency than dark market one, so its ethics is a bit better and so on.