Invest in the appropriate hardware and mine it.

Another alternative would be to trade goods or altcoins for fractional BTC.

Is mining still a viable path to obtaining bitcoin?

That's the $64,000 question. Seems Fidelity is interested in the answer, too.

https://www.reuters.com/article/us-fidelity-bitcoin-idUSKBN1...

You can work all the same with billing in Bitcoins/Ether instead of USD/EUR. Either with simple invoices with your wallet’s address or via special platforms as Bitwage [0].

[0]: https://www.bitwage.com

Anyone can use cash to buy pre-paid credit cards at a drug store then sell the code on localbitcoins etc. though I suppose this technically contradicts what I was saying earlier about needing a bank account. Still though, you are dependent on another company who is the one that actually controls your money. If they decide not to let you use it for any reason, that's it.