Reposting /u/jiszle 's comment since it was deleted.
Like some of the users here, I make my living off of cryptocurrencies so I feel like I am pretty good at the general process of buying and selling them. I initially learned it from coming to this subreddit a lot and PMing users about how they did it themselves.
I invested into Bitcoin in 2011 and checked back a few years later to see how much the price rose. I had no idea how much they'd be worth when I bought them, but I was able to sell them for way more than my initial investment. Older guides like these helped me: https://www.reddit.com/r/Bitcoin/comments/3h5t1x
This is basically what I do with every popular cryptocurrency now. I buy them early when they’re cheap, then sell them later when the price increases, pretty simple process but most don’t even know what cryptocurrencies are. I did it with Ethereum as well; bought at $20 then sold most at $200.
The newest coin I’m applying that idea to is Karbon. I know people are going to say I'm just shilling & I mostly just put my money into projects that are the most hyped up. I’m also only investing into it because a lot of people are talking about it on bitcointalk.org and their subreddit /r/KarbonApp has increased to over 18k subscribers in a month, so on the surface they seem popular, but who knows. I could do more research into all the other ICOs but that would take a lot of time and I mostly go off the hype coming from certain communities.
Check out these sites if you want to see more ICOs, although you should do your research before investing into random ICOs. Don't just put money into 100 of them at once, that's not logical:
https://www.icoalert.com/
https://www.coinschedule.com/
Some other ICOs you can check out are NEVERDIE, district0x, Ziber, and EOS (but I'm not really familiar with them tbh). I would suggest that people mostly invest into Ethereum and then put some money into ICOs if you feel confident about them. Problem is with places like bitcointalk.org is that people will invest into 20 or so ICOs or cryptocurrencies and they never see much of a return because half of them may fail or never increase in value much.