Polkadot is definitely one of best and biggest projects with the most potential that came out in the last two years. The hype around polkadot was massive and it still is kind of but it slowed down a little, which is normal. The thing with polkadot is that the price already made a x100 or more if i remember correctly so you always need to consider this too before an investment. Does Polkadot still has some room to grow? Probably yes, but is there still room for another 100x... i am not really sure about that. Another point that i don't really like about the polkadot tokenomics are that the supply is unlimited, which is never a good thing if you want the price of an asset to increase.