Holding and day trading USD & Bitcoin exclusively (for now).
I'm waiting for another large deposit from one of my bank accounts before I seriously spread out into altcoins.
Mining seems like a giant pain in the ass.
edit: Also, one of my goals with crypto is to make the equivalent of my bi-weekly salary at my day job each week. If I can do that I might end up working part time there or... leave potentially. 
How much time do you invest in this stuff? I suppose any fool can start trading and be lucky but even tho I have absolutely no fucking clue about any of this, I guess you've got to do at least some research to stand your ground.
Not a ton of time. After an hour has passed I look for "buy and sell signals" on this chart. I use RSI, MACD, Bollinger Bands, Volume, and sometimes Ichimoku Cloud indicators to help aid my trading decisions so I can gain about 80% certainty about how things will pan out:
https://www.tradingview.com/chart/hCueyyM0/#If you know what to look for it's pretty easy. Then again, I have been on-and-off studying this stuff for a while after I started paper trading on this thing called IQ Options (which isn't available in the US anymore).
spoiler (click to show/hide)
Also, I don't bet the "whole farm". I put in relatively small amounts at a time and have stop losses in place on GDAX that will pull me out of a trade if it doesn't go how I want it to. Also, inversely, I can set up GDAX to sell off my trades when they reach a certain price so I'm not sitting in front my computer all day waiting to sell at some high point. It'll just do it automatically for me.
Good luck anyway. Tho I hope you weren't serious about ditching your job for this
It would be short term if I did.
I just need something that allows me to work from home and for myself while I try to figure out what I want to do with the rest of my life because I'm realizing now that I don't want to be in my late 30s working long hours at some web design/marketing firm for people that I despise for hardly any money (at least relative in my field).
