You see that it's going to be $10 for the upcoming days.
How can you be sure telling that if you have no evidence and analysis that can support that speculation of yours. All you have said is mere speculation and you have just put the link of the website and whitepaper.
Other than that, nothing explains why it can reach that price.
Maybe, he is just shilling about the project as he has vested interest on this one. It is better to explain elaborately why a certain project is going to rise, so people will not take it as just shilling the project. DOT is a promising one, but you also need to evaluate if the project under this network is also promising and don't have empty foundation.
Checked with coinmarketcap. The marketcap, circulating supply, max supply isn't visible. Have got above $4.5M trading volume with the major volume out of uniswap. Polkadot has been gaining good market through its potential growth through different means, for the same we can't expect big growth with every altcoin developed over the platform. For someone preferring to accumulate little or diversify the portfolio can invest a small amount on it. Op might've invested on it, and for the purpose of pumping the market through further investment he has begun this thread.