Well there are so many advantages for people depending upon what they use bitcoin for. Top 3 reasons which I feel are as follows :-

- Part time/ Full time income through different sources like Trading, Joining different  camping, Escrow services, Freelancing etc
- Easy to transfer btc form one country to other within few minutes with some fees to be paid for transfer.
- New opportunities for so many people . Its a boon for unemployed and also for people who want to do something of their own and want to quit their jobs, I know people who have left their full time job and are into bitcoin related activities now.