Bitcoin will become global currency.
Bitcoin can be use as payment in everywhere, like shops, stores. groceries, gas, transportation, and other places.
Everyone has their own bitcoin wallet, and we can do transfer/transaction easier.

It doesn't matter how many people you know, knew or aware of Bitcoin. If people around you don't even care about Bitcoin, why do you think it is not known or are not widespread? You are being narrow-minded, IMO.

The future of bitcoin in my view is bright, because Bitcoin is a future currency, in the coming year, everyone will see bitcoin will be the rock online currency, because now most of the online currencies are here, but Bitcoin is the best in all over, it is clear to say in the coming 10 year, Bitcoin has a great place in this world.    I guess bitcoins will be the best currency ever.

I think so too, but i believe it need some time to happen as you noticed, may be 10 years or more. Bitcoin is already successful currency till now and it's growing up daily, so we guess it's having shining future surely.

but to me, as i guess bitcoin will still exist in the future.
but it can not replace "real money". but it will be a role model for all altcoin.

The immediate future is adding segwit into the main net. Segwit has already proved that it can deal with 2MB+ blocks, so once we add this, we'll also have schnorr signatures, which means even more scalability, more privacy, and lightning network will be ready to be deployed.
Future is looking better than ever in the history of Bitcoin. Im buying as much as humanly possible.

But I think now everyone knows that the future of bitcoin is better and more better than dollar etc, as a day is coming when everyone will use it for their payment internationally because of its attractive features and high restrictions with other currency.

Maybe the specualations have a major role in the value of bitcoin, when a speculation is created by an expert or a group of experts that the price will go higher in the coming months, then every one try to buy as much as possible, the demand is increased and no one sell their coins at low price.

In my expectation, bitcoin will surely take a lead in the digital currency. It will also get used as a payment gateway for most online stores. As most threads it won't make the other currency use get reduced.