I don't use it as a main investment, but I do dabble with it and bought into litecoin and ripple in the last few months. its been doing well, but its for a quick grab only, this will not last. I bought $15k worth of bitcoin back when it was a little above $850 and sold it all off two days ago, simply because its scary at this point especially when its been from $16k to $19k and back a few times in the last few days. Ripple (xrp) will make you some money if you have not already bought it, but again its risky and you have to dump it quickly, don't hold on to it. I suspect it will go well above a dollar each and part of me sees it around $20 or if we are lucky to where litecoin has gone in the $300 range lol but who knows. tread lightly and only put in what you can afford to lose and not hurt other investments.