I'd advise you try GPU mining altcoins (ETH, XMR, ZEC, ..) and don't mine Bitcoin. You can sell the alts for Bitcoin if you want to hold Bitcoin.
The reasons behind this would be:
* when the hardware becomes more or less obsolete you still can resell it as "used gaming hardware", as opposed to ASIC (for BTC) which would become useless.
* you can switch to the most profitable coin, you have more options around and more will come out.
* the initial investment can be smaller