For me, why should people use bitcoin because as you said this is the future money. We are now living in the 21st century where the digital and technology rules. That is why we also need to improve our money from fiat to digital coins. Having a digital coin will make our transaction more faster than ever but sadly Bitcoin today is very slow when transaction but in the near future when bitcoin still grows it will become better.

No you are wrong there , it depends how you secured your bitcoins and private keys , for some.hackers it was easy for them to steal your bitcoins thats whay i said it depends on you . People should invest not only by knowing it is secured bitcoins have a big risk than banking your money to a commercial banks. Its up to you how to use bitcoins and your accounts . People invest in bitcoins because of its big potential growth in the next decades.

Because bitcoin can provide offerings through unique features that an ordinary wallet or saving bank cannot do. For the past years that bitcoin has beekm established it  provides decentralization strategy that enables users to manage and have their private access in their accounts and it serves as a handy wallet wherein you can store large amounts of money without worrying that bringing big amount of money can bring you into harm or attract snatchers. Also fast transactions with low transaction fee that is a great benefit for its users.

Instant transaction yo! or so much faster than almost any other online version

Bitcoin can be used for many reasons, Bitcoin is considered as one of the best profitable investment and business sector. people may use bitcoin for the purpose of shopping, gambling, mining and many others transaction purposes. but my view is that the best thing denotes the investment purpose.

Bitcoin has got various usage and those has been cleared stated by the above mate. In particular why we people need to use bitcoin is that it's an evolution in the economic growth. As a part it's a technology derived asset that has grown potentially, also growth with technology keep on growing as the world requirement increases. So to meet this as a early preparation being with digital currency is a right decision.

Bitcoin the currency was the first of its kind: a global, decentralized cryptocurrency. While this sounds strange, it actually makes sense. As the world becomes less dependent on states and borders, the internet is a shared space where anyone in the world can communicate or create business. A universal currency not dependent on any single country makes more sense if you view the internet as its own nation-state. Just like temperature, distance, and weight are measured the same way across the world, why shouldn’t there be one unit of account for value. that's why peoples use Bitcoin

Besides future and all, it is also great currency for present use. A commodity on which people can literally do the living for themselves and family. It has become source of income for many people who were helpless before and were not able to find any real jobs out there. Bitcoin has just made the lives better for many. The future is of course well versed and will improve more lives than today. Bitcoin should not be looked at as future money but it is more than that.

I disagree about the "cheap" term that you have used, because using bitcoin is not cheap, I mean even the transaction fee is not like that way it is before, it is too expensive to most of the users here in this forum, so I guess using the term "cheap" is not appropriate. If you are saying that it is cheap because you could buy things easily in a small amount compare if you are going to buy it through fiat, then I guess you do have a point, but still it is not a good thing to do.

Spending bitcoin on every transactions that you are going to have in your everyday lives for example is just a waste of profits that you could make out of it if you are going to hold it in the long run.

People should use bitcoin because it will help them a lot financially speaking. And what's great about bitcoin is that it's very convenient to use because it's in a digital form of currency.