I would not suggest Mining Bitcoin is something you invest into now. Maybe Altcoins will be worthwhile but otherwise its going to be risky. You will not make a decent profit. Estimated global mining costs is at $3,504,984,284 annually. 34.19 US households can be powered for 1 day by the electricity consumed for a single transaction. 495.77KG of CO2 per transaction.https://digiconomist.net/bitcoin-energy-consumption
 Its not environmentally friendly. PoW is just not a sustainable consensus. We need to look to other alternative like Bitcoin Origin for example. I read about their Eco friendly approach to a new consensus algorithem (Proof of Ambassador). This is an Project worth looking at in my opinion.