Building a mining rig has been one of the most frustrating and fun things that I have ever done. I have placed roughly $600 into my rig and my RIO, according to the average metrics on NiceHash, will be 4 months. You tell me how many investments have an ROI of 4 months!
Here is the amazing part.
if I run my rig for 4 months and earn 0.045216 BTC, HODL, and we hit the "projected value" of $100,000 USD in 2018, I would be holding onto $1362.96 with a 900% increase from $10,000 per coin (more than double my investment), low balling my projections as bitcoin currently sits at $11,864.40 at the time of this post. That also is not equating selling my rig at pretty much what I paid for it as its only 4 months old.
GPU mining is profitable quickly and if value continues to rise, you hold something of higher recognized value than the almighty dollar.
No, i will not be selling my BTC or any other coin at $100,000 USD. You be crazy!
*this is not financial advice and pure projection on my part. I assume no responsibility for what you decide to do with your money.