I can definitely recommend
Crypto-Games(referral link), I'll post a small review below.
- Their casino is provably fair, you can always be completely sure that all bets you place are fair and the casino doesn't cheat you.
- They have a very low minimum deposit and minimum payout, minimum withdraw is only 0.002 BTC
You can also pick how much fees you want to pay.
- Support for 9 coins: Bitcoin, Litecoin, Dogecoin, Ethereum, Monero, Dash, Peercoin, Stratis & Gridcoin
- Possibility to invest, also possible with low amounts, check their website for more info.
They offer really extensive statistics on their profits and stats for all coins & games. So investors know what they can expect to earn.
- Quick support for basic problems in chat, there's always a moderator online.
- Low house edge of 0.8% for dice game, the lottery is even +EV, Crypto-Games doesn't make a profit from that, they even put an extra 1% in the prize pot.