I am new to crypto. I bought a $100 of Starta at .45 and it went to .82 so i sold it and my btc says 47.50 usd . Why?

according to coinmarketcap, there is only two market for Starta coin which is in Waves Decentralized Exchange and Tidex and I don't see there is a pair usdt with starta. I see that in that those market is for btc pair starta or start pair waves so I think it doesn't make sense if he said that because I see that he can sell at 0.82 and it means, he can make a double profit and this means his money is increased too. I think he needs to explain more about this and it is better to give some image so we can help him.