1.In future buying bitcoin is more easier than past condition ad people can complete so many task very easily.
So many tasks could be completed, but Bitcoin should get out of its jeopardized situation that its currently stuck into. Scaling is still the most important issue that needs to be resolved before we talk about its future any further.
2.most of company use bitcoin as a local currency that helps to regulate bitcoin like regular currency and more company will interest for using this currency(bitcoin)
Agree with me or not, Regulations will definitely end this up converted totally into centralization, which it's not made for.
3.international client are more visible if this currency will use globally.
They are, already. Blockchain is a public ledger (sorry if I misunderstood here).
Even if we don't consider blockchain, they are still too much visible as boundaries have been broken by Bitcoins to make ends meet just the way internet does.
4.in future if government use the protocol then cyrpto-currency will protected and people feel safe for using this currency.
Protected? No. Tied? Yes.
They will not protect but will take over the whole control in their hands (I know we need their support because they are the ones who govern and without their permission, we might not be able to even access our Bitcoins), but I still fear that if centralization takes place, everything will become as usual as we used to live when Bitcoin was not there and we were using fiat.