Doge coin is the official tippning coin so iduno what new things this coin brings to the market?
It’s the official tipping coin of our exchange

Umm yeah, but the main feature of your project, other than offering an exchange, is the availability to tip using any cryptocurrency listed on your exchange, so IMO, either (a) your native tipping coin would rendered useless as people can use any token (doge for instance) or (b) your exchange became rather useless (in case you remove the option to tip with whatever token listed, to "force" the usability of your native token)
uTip is mostly a Bounty type .. Rather than we spending Btc which has huge transaction cost we are offering this to members .. a) yes people can use any token but uTip is something which is available to them for free as we tip every day b) we are not compelling any one to take uTip .. it’s just an additional income which users can sell from August 1st ! It’s members option to make money selling uTip .. if you want more money take it .. if you are already rich tip it .. as simple as that