When I went into crypto currency I didn't go overboard - I used my spare cash that I had to make some mining rigs for ethereum I would never go more risk than what I can afford but it was a very good idea because my little work on the side of my ethereal (and other crypto currencies) makes me an extra 1500$ for free per month (after electric costs) and it has already paid itself off for what I paid for it so it is very wise to get into it.
Just make sure you get the rx 580 graphics cards and stay away from certain types of memory because your hash rate will be much lower (30 mega hash m/hs is good) you will lose about almost 33% if you get the wrong type of memory you will lose a lot in production per month and it will take longer to get back what you paid for.
Do not fear! - If you have an extra 3000$ approximately (per rig but depends on what cards you buy) you will get it back after a few months then everything else is profit! So do not stress. It is a great way to make extra cash on the side.
I have made a few already on the side and it has helped me a hell of a lot because gubbermint can't see it to come and steal it and I made back what I paid for it so I have only gained I have lost nothing
Gubbermint loves stealing that's all they every ****ing do is steal so this is why it is wise to hide it from them.
What you can do as well is if you country does not recognize bit coin (any crypto currency) they cannot legally tax you on what you are earning yet it is wise to not draw attention.
Also make DAMN SURE that you have a VPN set up already in place so that nobody can see what you are doing see...
Remember these gubbermints want to rob you and steal from you they don't care how hard you worked to achieve that money they just want to steal everything.
They should change their name to 'THIEVES'
Do not go into the mining rigs now as I have already made my money back but if you decide to make a GPU mining rig now at the current prices (6 cards RX 580 / RX 570 / 470 / 480) be careful because it might take a while for you to get your money back as ethereum right now is at about 550$ (today) and a 6 card rig (that is doing 180m/hs in total (30 m/hs per card) can make about 200$ per month (this is profit after electricity costs)
Remember a card (rx 580) costs approximately 200usd - 300 $ per card so if you do the math it will take more than half a year to pay back your rig not like when I got mine it took only a few months.
I'd say start putting together an ethereum rig only when the price is very high but remember only risk what you can afford okay?
Do not risk what you can't afford be careful!
Listen to what some of the guys are saying but remember if you were like me when the price was very high you can easily make the money back that you spent only after a few months but only when it was like 1000$ per ethereum.
If you want to chat let me know and I will try help you!