I am not that too good about cryptocurrency but I can say that bitcoin is legit and secured as long as the wallet storing it is safe and legit, bitcoin is easy to be stolen by havkers and scammers but is hard to return but this can be prevented once you are using a safe wallet.
Bitcoin itself is legit, it was made year 2009, how can you say that it is fake if until now it is atill existing, bitcoin lives for 11 years as of now and it will live longer for the future.
there's possibility that it dies later if it doesn't do the government good, I suppose. But hopefully, the wallet will stay safe and our coins can keep bringing us more money