I have bitcoin cause I like to use my money anonymously and like this i have alot of privacy and also bitcoin has close to zero fees.
Other reason is that its like a investment and it can earn me alot of money.
We have the same reason why do I have Bitcoin since I would like to transfer money without hassle and big fees because I d usually send money to my family and this kind of transaction of Bitcoin really helps me with this and also I'm earning also Bitcoin which Is also an another source of income.
The problem with sending the money with the bitcoin is that you have to exchange the bitcoin twice in the process.