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??
There are pro's and con's for each of these methods... Hard to say which one is fasted, safest, most beneficial... If there was one super-method, everybody would be using it and the other methods would hardly exist. In the end it's about finding a purchase method that suits you.
Exchanging on an exchange, paying by wire: if you stick to the biggest, regulated exchanges this could be pretty fast (depending on how much time it takes your wire transfer to be registered). Expect full KYC. Wether or not it's beneficial depends on your trading strategy and how the market is behaving, aswell as the fee structure of the exchange
Exchanging on an exchange, paying with credit card: if you stick to the biggest, regulated exchanges this is fast. Wether or not it's beneficial depends on your trading strategy and how the market is behaving, aswell as the fee structure of the exchange. Also: full KYC
Exchanging P2P: better for your anonimity, can be really fast (cash to BTC P2P for example). Usually the sellers do take a little larger profit margin, but sometimes deals can be done. Do realize you're going to somebody you have never met to exchange fysical money in your pocket against BTC. Story's of people getting robbed are not unheared of.
Buying BTC on one of those instant non-KYC websites: usually pretty fast, sometimes less secure, usually more expensive
Accepting BTC as payments: could be fast if you make a lot of sales... Could be nonexistant if you have no customers (or if your customers don't want to use btc). Can be expensive and insecure (if you use bitpay for example).
Mining: this is actually running a big business. If you have dirtcheap electricity, have a good deal with a hardware provider, have cheap labour costs, have a good warehouse to store your ASICs, this *could* be fast, safe, anonymous and profitable... But if you don't know what you're doing, or if you don't have a lot of investment money, or if you don't have cheap electricity,... you could be mining at a loss in no time...