Yes bitcoin is really secure. no one can steal bitcoin, except for our own carelessness. 
The government can not be that easy to ban bitcoin transactions, because bitcoin is the future.
Security is high in bitcoin. Yet, security can not be guaranteed since technology is related here.Hackers can hack bitcoin wallet.Yet, bitcoin is more safe than any other currency.It is decentralized so no government can not control it.The government can not be that easy to ban bitcoin transactions, because bitcoin is the future.