There are different ways by which we can obtain bitcoins like Buying on exchange, accepting bitcoin payments or using mining.
Which is the fast and beneficial resources of obtaining bitcoin??
If you want an immediate profit in just a short span of time, then you need to invest money and you need to risk it for you to have a chance of having a big ROI in the end or you can sell you skills online which use a lot less of money. Otherwise you may try a non risky to low risk and without any investment by doing some signature campaigns or faucet(which is not recommended since it takes so much time for a few bitcoins it gives)