Bitcoin is good investment but I wouldn't suggest to put all your money into it. I wouldn't suggest puting all your money into anything, not just Bitcoins. Every investment is a risk and there is always the danger of losing money so you have to invest with care and you always have to have some back up. Don't ever invest more then you can afford to lose.
Totally agreed. Three is no any asset that worth to invest all-in.
The question is a kind of illustration why governments so much concern. The market is absolutely unregulated.
That is why you can read so called "disclaimer" by small font at any letter or analyse related to the traditional fund market. Most of them says that former performance dosnt guarantee future results.