Which is the fast and beneficial resources of obtaining bitcoin??
The fastest and most beneficial resources of obtaining Bitcoin will depend on different case scenarios, your capacity and on what you want to achieve. Before buying on exchanges, you will need to have another crypto which you can sell to Bitcoin then withdrawing to your personal wallet or if your country is supported by some exchanges like Binance, then you can get your Binance account verified thus buying Bitcoin with your credit card. Secondly, accepting Bitcoin for payment is also good but you will have something that the person will buy and also, you will need to be in a location where Bitcoin is accepted and people knows about Bitcoin for easy buying and selling. And lastly, using mining will warrant you to owing mining rig, and also if the cost of energy is cheap in your location then it will be beneficial to you but if it is not, you might run at loss.
These are different case scenarios, thus the one I find the fastest is buying from exchanges as you have two options, buy Bitcoin with your credit card or buy with another crypto like Ethereum.