Bitcoin is decentralized and is controlled by you. You hold your keys which means you control your crypto. You are your own bank. Whilst banks have advantages of customer support, you still have to go through the hassle of KYC, long confirm transfers, possible freezing, information leakage, etc. Bitcoin has none of this.

Regarding your question of bitcoin shutting down, that is not possible. Bitcoin is a P2P network which means as long as 2 or more people have bitcoin. It will be mined to emit transactions. Everyone can mine, which means you yourself can support bitcoin transactions.

Still sceptical? Check out the bitcoin uptime 
https://www.buybitcoinworldwide.com/bitcoin-uptime/