Doge also have no limited supply. DOT young project, but many exchange already listed it. The last one EXMO.
And lets not forget about eth with an infinity supply as well, dot is not the only coin that will increase in supply as the time passes, eth has infinity supply and it doesn't stop the price from getting to the peak, what matters most is having the right tool (i.e the strong fundamental) to push the project forward, polkadot chain is gaining attention from different dev too, the platform is growing, which is the most important.