In the beginning, BTC could be used to exchange of low value of virtual items, such as buying web sites or game points, virtual items, etc., afterwards, some people in order to get these virtual items, items may be in online auction own reality for BTC, others want to buy the real goods, but no BTC at hand, and then use real money to exchange BTC, as a result, BTC begin to flow, and have a "value".
In other words, bitcoin is inherently valuable as a means of payment; If it loses its function as a means of payment, it becomes worthless.
The value of money: it exists because of payment.
People can help btc now become their payment and investment. so bitcoin requests must always be in a crypto. from there that makes crypto a digital payment facility. In addition to being easy and simple, crypto also gives a very very small fee. so it is good for small or large nominal payments, and all is done in real time.