I'm wondering why bitcoin was made if there are too many currencies in each country, why would anyone add or make a type of currency in the internet? For easier and faster transactions or so ?
Because bitcoin has many advantages like peer-to-peer transaction, anonymous, decentralized etc. Even it's easier to transfer fund in bitcoin to the people overseas instead of using wire transfer or western union, paypal and skrill which is not as convenience as using bitcoin and the other cryptocurrencies (regardless of the fees).
If you're wondering if bitcoin is dangerous maybe because many criminals using bitcoin as a payment method in order to not getting tracked. Basically, everything has its pros and cons.