So, why do we need to use Bitcoin???
simple answer , for my income for get more profit

Thats one of the reason why we use bitcoin, it has many opportunity to earn or make your money grow by investing in it and its your choice if you want to go full time. also by using btc, you can easily send money to someone with low fee unlike remittances.
That's right. Bitcoin price never stops rising so you can easily earn some extra profit from it. Furthermore, we can not deny that Bitcoin also provide us many other advantages such as not paying fees, fast transaction, etc. At present, Bitcoin is the most secure and safe currency which can not be hacked or be stolen if you know all of Bitcoin's functions