Biggest example is bitcoin which started its journey from 0$ and has controlled inflation. Its current price is mainly because of controlled supply and huge community behind the project. If there is no single example that doest mean that no new coin can perform.
Yes, that is true, because basically all new Altcoins always see examples in Bitcoin because he was the first to be born into cryptocurrency so that he has become the king of coins in cryptocurrency from the past to the present.