The strength of bitcoin comes from its infrastructure.
Bitcoin has become a payment method in many online shops, like paypal or credit card.
That shows the economy has gained a certain trust in bitcoin.
There are exchange services and whole businesses developed around bitcoin.
Recently bitfinex was hacked, but it just scratched the price of bitcoin a little bit.
I say that bitcoin became strong in price and reliable as a payment method.
yes because bitcoin payment is very simple,easy payment do not wait long all payments must be like this.the economy will be more advanced when all institutions support payments bitcoin this has been proven time paypal or credit card that shows the economy has gained a certain trust in bitcoin and Recently bitfinex was hacked no problems to price bitcoin now