OP made very good points about polkadot but sometimes it's not always about token sale price, check projects like LEND. If you go by price difference between current price and token sale price for most projects with solid team and progressive development, like LINK, you will be discouraged to buy at current price. OP mentioned ICO price was 30 cents and current price is about 6$, this doesn't matter much provided the demand of the coin increases over time. Polkadot is a dope project, I bought some DOT already. Thanks OP for the sincere in depth analysis.