The Bottlecap foundation gets a donation from people playing in the Casino??? Then for sure I am going to sign up.
Also, I was wondering, Does gambling in a Casino add value to Bottlecaps? Or does the whole thing basically look like 2 transactions between wallets, and nothing to build upon the value of the coin?
Gambling adds no value to the coin, if anything, it degrades it.
As a gambler, 1000's loose, and the house wins, and the 1 winner wins coins. The house cashes-out, and the gambler may or may-not cash-out also. In the end, there was no "losses" of coins value, other than the tiny bit of operating costs for the lotto/gamble.
However...
If the holdings are re-invested (thus, not in cash-out), in another gamble... That removes those coins from circulation for the duration of the lotto/gambling time, before the winner is drawn. That causes a slight "bump" in the market, for the positive value. But that turns into a negative value once they are later cashed-out.
Unlike a bank, that lends your holdings to others... holding coins is just stalling decreased value to a future date. The hope is that the value rises faster than the holdings value, so less losses are shown, at the time of dumping coins for a cash-out.
I think you're overthinking this and comparing too much with real economies. Coin gambling adds value to new coins because people can do something with them for the time being. I agree, many lose, few win at a casino. That's how it works. The more risk you take, the higher the
potential return. Nobody is forced to play of course...
At a casino you are buying entertainment and a chance to win a lot of coins. Is that a life-changer for a coin? No. But it's better than just getting coins in your wallet from faucets etc, waiting for God knows what.
Anyway in lighter news, you guys do know CAP can be used at the casino right? Thx to John Eden for that! 
Gambling certainly adds value to CAP. The more uses a coin/currency has, the more the value increases. Stop and think about the basics of money. The purpose is to exchange a note/coin for goods or services. From the seller's perspective, if the note cannot be easily used or exchanged then they won't want it. But as the note is used in/at/for more places and goods, the more useful the note. It's all about utility. Sure opening a single casino to CAP isn't going to make a huge difference in the long run, but it certainly helps give it a better chance to stick around longer.
Think of it like Bitcoin. If you couldn't buy drugs, gamble, pizza and actually buy legitimate items with it, it wouldn't be worth a whole lot since only (financial) traders would use it and a dip in price means nobody wants to hold them, causing the price to crash. I'm not saying the acceptance of bitcoin is the sole determinant of the price but it's certainly the most important factor.
