A lot of people here gamble to become rich, but some do it for fun.
The question is, if you wake up tomorrow with 50 million dollars, would you still gamble for fun, or would you forget about gambling and do other stuff? Personally I think I would still gamble. I do it now, and I know I realistically will never get rich off gambling, because I barely do it and I don't risk much money, just for fun sometimes, to test my luck.
So if I had a lot of money, I would do bigger gambles, but they would still enter in the "for fun" amount (for the new 50 million standard). For example, gambling 1K a month would be irrelevant, and winning with a 1K bet can give you big rewards if you are lucky. It would still be fun, in fact more fun, and it would be as non risky as it is now, in terms of going financially bankrupt.
Every monetary investment is a gamble. Every time you trust someone you are taking a gamble. I would definitely gamble if I had 50 million dollars. I find it relieves stress. However, I'd probably gamble my money on supporting the pursuit of animal rights and technological singularity. But I would still play Poker, Dragon's Tale, EVE Online and Heroes of the Storm for fun. Like... Gambling is definitely stressful, but it's something repetitive and gratifying that I can do without drama from other people. Just me and random chance. That said - my betting limit would probably be $800 if I had 50 million dollars. Right now my betting limit is whatever I earn off of faucets. If I were to bet more than 0.0016% of my networth on something, it would either be for a good cause or for a positive EV (e.g. investments).
Edit: Maybe I wouldn't gamble. Because it's very hard to enforce my own limits, and even with my 2mbtc bet limit I ignored that and went and bet 22mbtc instead of withdrawing.