Will it be possible if to develop a coin with another coin with fixed conversion with it. Let's say coinA = 10coinB and coinB is used for a gambling site with a chance to increase or decrease its value and CoinA has an option to be broken to coinB to supply the demand.
So if coinB is $0.01 you have an option to sell your coinA for $1.00 for someone who needs coinB to play on the site.
No, that's not how market economies work. Look at, for example, Venezuela, where there is an official fixed rate and a black market rate. The latter reflects the real value of the currency. Luckily, in the crypto-currency world, you won't be put in jail for participating in a marketplace.
The other option is if you have lots of cash and can prop your own currency up in the market place, e.g. how some European currencies are pegged to the Euro.
That's why I am asking when it comes to cryptocurrency not on the real world money.
Not without 'artificial' propping. Aka one 'controlling member or source' supporting the dips and peaks.
There could be an implementation like EC credits in Factom though.
EC credits are tethered to a certain amount of USD, so $1USD always equates to the same number of EC.
The price of Factoids can increase / decrease you simply just buy MORE / LESS of the EC credit.
You can only buy EC with Factoids.
The price between EC and USD is stable but the factoid is just worth more or less.
Though a big factor for its success is
1. EC can't be traded
2. EC will be burnt upon use.
Bringing this back to your example. Coin A could be the variable. Coin B is used to interact with a gambling website but - cannot be traded
and will be burnt upon use. Then from a fiat point of view Coin B could always be
worth the same.