I invested a small (hundreds) into Ethereum and a few other coins earlier this year. They've since doubled in value. I can imagine if you were a very high risk investor and believed in crypto's right now you could be making a lot of money.
Some like NEO and Waves did that for me. It took me cycling through 25+ altcoins to reach that level.
The 50,000,000 units were arbitrary distributed to unknown parties within China.
Relevant Reddit thread: https://www.reddit.com/r/CryptoCurrency/comments/6wo4od/have...
Potentially the worst source one can provide. Cryptocurrency buzzwords aren't an argument against the USD