Really, no one can point out a (possibly-)fatal flaw or danger other than regulation?
There are so many reasons that add up to failure if you ask me, but success or failure is subjective. If success is having something to speculate on or having something to transact in a black market other than paper fiat, than bitcoin is a success.
The reasons I see it as a failure is the following.
1. It works off the scarcity model.
2. It is easily manipulated and controlled.
3. The myth of decentralization is a lie.
4. The myth of a means to save money by avoiding excess fees is a lie.
5. Bitcoins value is depended on being denominated in USD or other national currencies
6. The ease of governments to tax, regulate, track and generally control bitcoin.
7. Massive energy cost to maintain and secure network. (massive mining cost)
8. Violates the regression theorem
9. Isnt a good store of value
10. Is an awful unit of account.. you cant denominate a mortgage in bitcoin
11. It doesn't solve any problems for the general population they dont want to protect their own money, thats why they use the bank.
and many more, it wont have mass adoption and yes you are believing the hype.