To answer your coin seriously I like the following:
Decred
Monero
And I kinda like:
Dash
Pivx

However, if I had that much money to throw away (and I'm not saying you do) I think it could be fun to go to page 4 or 5 on Coinmarketcap.com, find some coin with a massive supply and low volume, and then buy $30,000 worth at once, by yourself you could probably 5x the price of the coin lol! and then maybe others would pile in, you never know. Its kinda scammy of course but I would love to give it a go one day.