So, I am a gambler. I am going to go ahead and assume that 90% of the people in the crypto-space are as well, and I am probably being very generous with that number. Each and every person that is a part of that percentage is looking for that high-yield investment with a quick turnaround.
There is no lack of places to gamble crypto. Just do any sort of search online and you will be bombarded with offers and bonuses and all sorts of "free" stuff. I would advise being cautious and doing some research on these places, because most, if not all, of those bonuses and free-play offers come with astronomically huge play-through requirements.
Gambling can turn into an addiction, as it has the potential to release the same endorphins that using opiates does. One big win, and without some form of self-control it can completely wreck your life. Set limits and stick to them, don't chase losses, and cash out when you are ahead. I set a very reasonable 10 HIVE limit for deposits, and will take out my winnings at 225%. Anything more than that which are winnings is what I consider "free play", and i make foolish and hard to win bets with ridiculous odds. If I lose, then I lose. I do this once a week on HIVE.
I have to stress here that
******* THIS IS NOT A SHILL FOR THIS SITE!!!*******
There are other places around the internet that I frequent WAY more often that have much nicer affiliate program and a vastly broader selection of games.
This being said, I think it should be known that our little space here on HIVE has a casino.
https://kryptogamers.com/?ref=mirroredspork
Yes, they have a referral program. As much as i frequent this site you would think I have tons of referrals. 
Here is the "investing" portion (DYOR, always):
They offer dividends on their house win for staking the native token, GAMER.
They offer a "rakeback" in the form of the native token, GAMER, based on your level of play. Higher action, higher rewards in GAMER.
The GAMER token is openly traded on HIVE, with 3 different LPs. Decent liquidity, it would seem, so there should be no problems offloading your rewards or picking up some to stake for dividends.
https://beeswap.dcity.io/tokens/GAMER
https://beeswap.dcity.io/pools?search=gamer
- The site offers wagering in 4 different tokens, HIVE, DEC, STEEM, and GAMER.
All in all, gambling should be seen as a form of entertainment, not income. And just like investing in crypto (or any investment, for that matter), you should never invest more than you can afford to lose. This is doubly so for gambling. The house will always win in the end, if you stick around too long or go for that "one more bet".
I am a table games dealer for an occupation, and I always tell my players that gambling is just "short-term, high-risk investing, with the potential for high yields".
So be wise, be cautious, and don't get in over your head. And try to have a little fun with your "investments".